RAINIER MARK ENRIQUE GUIANG M.D.
Prescription History 1548217821
Anesthesiology - Pain Medicine in Riverside, CA

Active since May 30, 2006PECOS EnrolledAccepts Medicare Assignment
81.22/100
CMS Quality Rating
6900 BROCKTON AVE, SUITE 103, RIVERSIDE, CA 92506(951) 784-7111(866) 287-0329 Get Directions

NPPES record last updated: May 14, 2013. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Medicare Part D Prescription History

Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for RAINIER MARK ENRIQUE GUIANG M.D., an active Pain Medicine specialist practicing in Riverside, CA. Our medical registry currently tracks 27 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 3,246 documented patient claims. Among these therapy options, the most frequently utilized medication is Hydrocodone-Acetaminophen, which accounts for 675 claims alone. Use the table below to sort by claims, cost, or utilization compared with the state average; select any medication for its full profile.

27
Medications
3,246
Total Claims
3,398
30-Day Fills
Hydrocodone-Acetaminophen
Most Prescribed · 675 claims
View details
27 medications · 2023 Medicare Part D
Medicare Part D medications prescribed by RAINIER MARK ENRIQUE GUIANG M.D. in 2023, with claim volumes, costs, and CA state comparisons
Medication Claims 30-Day Fills Days Supply Cost / Claim Utilization vs CA Avg

Utilization: claims vs the average CA prescriber

This provider
675
CA average
79.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$23.55
CA average
$22.00

Gross Part D cost per claim; not the patient's out-of-pocket price.

675.0
30-Day Fills
19,158
Days Supply

About Hydrocodone-Acetaminophen: This combination medication is used to relieve moderate to severe pain. Show more ▾

It contains an opioid pain reliever (hydrocodone) and a non-opioid pain reliever (acetaminophen). Hydrocodone works in the brain to change how your body feels and responds to pain. Acetaminophen can also reduce a fever.

Utilization: claims vs the average CA prescriber

This provider
557
CA average
81.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$13.24
CA average
$21.28

This provider's average cost per claim is below the CA average for this medication.

597.3
30-Day Fills
17,870
Days Supply

About Gabapentin: Gabapentin is used with other medications to prevent and control seizures. Show more ▾

It is also used to relieve nerve pain following shingles (a painful rash due to herpes zoster infection) in adults. Gabapentin is known as an anticonvulsant or antiepileptic drug. A cyclohexane-gamma-aminobutyric acid derivative that is used for the treatment of PARTIAL SEIZURES; NEURALGIA; and RESTLESS LEGS SYNDROME.

Utilization: claims vs the average CA prescriber

This provider
308
CA average
43.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$6.67
CA average
$7.59

This provider's average cost per claim is below the CA average for this medication.

308.0
30-Day Fills
7,461
Days Supply

About Tramadol Hcl: See also Warning section. Show more ▾

This medication is used to help relieve moderate to moderately severe pain. Tramadol belongs to a class of drugs known as opioid analgesics. It works in the brain to change how your body feels and responds to pain. A narcotic analgesic proposed for severe pain. It may be habituating.

Utilization: claims vs the average CA prescriber

This provider
190
CA average
48.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$3.83
CA average
$6.44

This provider's average cost per claim is below the CA average for this medication.

202.0
30-Day Fills
6,060
Days Supply

About Meloxicam: Meloxicam is used to help relieve moderate to severe pain. Show more ▾

Meloxicam is known as a nonsteroidal anti-inflammatory drug (NSAID). It works by blocking your body's production of certain natural substances that cause inflammation. This effect helps to decrease swelling or pain. A benzothiazine and thiazole derivative that acts as a NSAID and cyclooxygenase-2 (COX-2) inhibitor. It is used in the treatment of RHEUMATOID ARTHRITIS; OSTEOARTHRITIS; and ANKYLOSING SPONDYLITIS.

Utilization: claims vs the average CA prescriber

This provider
188
CA average
48.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$30.82
CA average
$31.01

This provider's average cost per claim is below the CA average for this medication.

188.0
30-Day Fills
5,237
Days Supply

About Oxycodone-Acetaminophen: This combination medication is used to help relieve moderate to severe pain. Show more ▾

It contains an opioid pain reliever (oxycodone) and a non-opioid pain reliever (acetaminophen). Oxycodone works in the brain to change how your body feels and responds to pain. Acetaminophen can also reduce a fever.

Utilization: claims vs the average CA prescriber

This provider
183
CA average
30.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$8.98
CA average
$10.69

This provider's average cost per claim is below the CA average for this medication.

183.0
30-Day Fills
1,116
Days Supply

About Methylprednisolone: Methylprednisolone is used to treat conditions such as arthritis, blood disorders, severe allergic reactions, certain cancers, eye conditions, skin/kidney/intestinal/lung diseases, and immune system disorders. Show more ▾

It decreases your immune system's response to various diseases to reduce symptoms such as swelling, pain, and allergic-type reactions. This medication is a corticosteroid hormone. Methylprednisolone may also be used with other medications in hormone disorders. A PREDNISOLONE derivative with similar anti-inflammatory action.

Utilization: claims vs the average CA prescriber

This provider
121
CA average
38.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$39.25
CA average
$47.56

This provider's average cost per claim is below the CA average for this medication.

121.0
30-Day Fills
3,575
Days Supply

About Pregabalin: This medication is used to treat pain caused by nerve damage due to diabetes, shingles (herpes zoster) infection, or spinal cord injury. Show more ▾

This medication is also used to treat pain in people with fibromyalgia. It is also used with other medications to treat certain types of seizures (focal seizures). A gamma-aminobutyric acid (GABA) derivative that functions as a CALCIUM CHANNEL BLOCKER and is used as an ANTICONVULSANT as well as an ANTI-ANXIETY AGENT. It is also used as an ANALGESIC in the treatment of NEUROPATHIC PAIN and FIBROMYALGIA.

Utilization: claims vs the average CA prescriber

This provider
112
CA average
30.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$15.43
CA average
$16.10

This provider's average cost per claim is below the CA average for this medication.

112.0
30-Day Fills
2,885
Days Supply

About Acetaminophen-Codeine: See also Warning section. Show more ▾

This combination medication is used to help relieve mild to moderate pain. It contains an opioid pain reliever (codeine) and a non-opioid pain reliever (acetaminophen). Codeine works in the brain to change how your body feels and responds to pain. Acetaminophen can also reduce a fever.

Utilization: claims vs the average CA prescriber

This provider
109
CA average
55.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$27.32
CA average
$41.99

This provider's average cost per claim is below the CA average for this medication.

113.0
30-Day Fills
2,108
Days Supply

About Diclofenac Sodium: See also Warning section. Show more ▾

This medication is used to relieve joint pain from arthritis. Diclofenac belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). If you are treating a chronic condition such as arthritis, ask your doctor about non-drug treatments and/or using other medications to treat your pain. A non-steroidal anti-inflammatory agent (NSAID) with antipyretic and analgesic actions. It is primarily available as the sodium salt.

Utilization: claims vs the average CA prescriber

This provider
91
CA average
43.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$19.13
CA average
$60.11

This provider's average cost per claim is below the CA average for this medication.

96.2
30-Day Fills
2,825
Days Supply

About Celecoxib: This medication is a nonsteroidal anti-inflammatory drug (NSAID), specifically a COX-2 inhibitor, which relieves pain and swelling (inflammation). Show more ▾

It is used to treat arthritis, acute pain, and menstrual pain and discomfort. The pain and swelling relief provided by this medication helps you perform more of your normal daily activities. If you are treating a chronic condition such as arthritis, ask your doctor about non-drug treatments and/or using other medications to treat your pain. See also Warning section. This drug works by blocking the enzyme in your body that makes prostaglandins. Decreasing prostaglandins helps to reduce pain and swelling. A pyrazole derivative and selective CYCLOOXYGENASE 2 INHIBITOR that is used to treat symptoms associated with RHEUMATOID ARTHRITIS; OSTEOARTHRITIS and JUVENILE ARTHRITIS, as well as the management of ACUTE PAIN.

Utilization: claims vs the average CA prescriber

This provider
87
CA average
32.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$8.45
CA average
$16.68

This provider's average cost per claim is below the CA average for this medication.

87.0
30-Day Fills
2,610
Days Supply

About Cyclobenzaprine Hcl: Cyclobenzaprine is used short-term to treat muscle spasms. Show more ▾

It is usually used along with rest and physical therapy. It works by helping to relax the muscles. This medication is not recommended for use in older adults because they may be at greater risk for side effects while using this drug. Ask the doctor or pharmacist for details.

Utilization: claims vs the average CA prescriber

This provider
83
CA average
26.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$16.95
CA average
$15.00

Gross Part D cost per claim; not the patient's out-of-pocket price.

83.0
30-Day Fills
2,490
Days Supply

About Methocarbamol: Methocarbamol is used to treat muscle spasms/pain. Show more ▾

It is usually used along with rest, physical therapy, and other treatment. It works by helping to relax the muscles. A centrally acting muscle relaxant whose mode of action has not been established. It is used as an adjunct in the symptomatic treatment of musculoskeletal conditions associated with painful muscle spasm. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1206)

Utilization: claims vs the average CA prescriber

This provider
74
CA average
41.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$9.47
CA average
$9.06

Gross Part D cost per claim; not the patient's out-of-pocket price.

74.0
30-Day Fills
2,220
Days Supply

About Ibuprofen: Ibuprofen is used to help relieve mild to moderate pain. Show more ▾

When used with an opioid (such as morphine), it may be used to relieve moderate to severe pain. It is also used to reduce fever. Ibuprofen is known as a nonsteroidal anti-inflammatory drug (NSAID). It works by blocking your body's production of certain natural substances that cause inflammation. This effect helps to decrease swelling, pain, or fever. A non-steroidal anti-inflammatory agent with analgesic, antipyretic, and anti-inflammatory properties

Utilization: claims vs the average CA prescriber

This provider
67
CA average
41.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$23.23
CA average
$28.61

This provider's average cost per claim is below the CA average for this medication.

83.0
30-Day Fills
2,490
Days Supply

About Baclofen: Baclofen is used to treat muscle spasms caused by certain conditions (such as multiple sclerosis, spinal cord injury/disease). Show more ▾

It works by helping to relax the muscles. A GAMMA-AMINOBUTYRIC ACID derivative that is a specific agonist of GABA-B RECEPTORS. It is used in the treatment of MUSCLE SPASTICITY, especially that due to SPINAL CORD INJURIES. Its therapeutic effects result from actions at spinal and supraspinal sites, generally the reduction of excitatory transmission.

Utilization: claims vs the average CA prescriber

This provider
64
CA average
37.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$31.60
CA average
$17.54

Gross Part D cost per claim; not the patient's out-of-pocket price.

92.0
30-Day Fills
2,760
Days Supply

About Tizanidine Hcl: This medication is used to treat muscle spasms caused by certain conditions (such as multiple sclerosis, spinal cord injury). Show more ▾

It works by helping to relax the muscles.

Utilization: claims vs the average CA prescriber

This provider
58
CA average
40.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$23.61
CA average
$50.41

This provider's average cost per claim is below the CA average for this medication.

86.0
30-Day Fills
2,575
Days Supply

About Duloxetine Hcl: Duloxetine is used to treat depression and anxiety. Show more ▾

In addition, duloxetine is used to help relieve nerve pain (peripheral neuropathy) in people with diabetes or ongoing pain due to medical conditions such as arthritis, chronic back pain, or fibromyalgia (a condition that causes widespread pain). Duloxetine may improve your mood, sleep, appetite, and energy level, and decrease nervousness. It can also decrease pain due to certain medical conditions. Duloxetine is known as a serotonin-norepinephrine reuptake inhibitor (SNRI). This medication works by helping to restore the balance of certain natural substances (serotonin and norepinephrine) in the brain. A thiophene derivative and selective NEUROTRANSMITTER UPTAKE INHIBITOR for SEROTONIN and NORADRENALINE (SNRI). It is an ANTIDEPRESSIVE AGENT and ANXIOLYTIC, and is also used for the treatment of pain in patients with DIABETES MELLITUS and FIBROMYALGIA.

Utilization: claims vs the average CA prescriber

This provider
50
CA average
38.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$88.86
CA average
$170.19

This provider's average cost per claim is below the CA average for this medication.

52.0
30-Day Fills
1,515
Days Supply

About Lidocaine: This product is used to help reduce itching and pain from certain skin conditions (such as scrapes, minor skin irritations, insect bites). Show more ▾

It may also be used to help relieve nerve pain after shingles (infection with herpes zoster virus). Lidocaine belongs to a class of drugs known as local anesthetics. It works by causing a temporary loss of feeling in the area where you apply the patch. A local anesthetic and cardiac depressant used as an antiarrhythmia agent. Its actions are more intense and its effects more prolonged than those of PROCAINE but its duration of action is shorter than that of BUPIVACAINE or PRILOCAINE.

Utilization: claims vs the average CA prescriber

This provider
38
CA average
42.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$24.09
CA average
$25.37

This provider's average cost per claim is below the CA average for this medication.

38.0
30-Day Fills
1,080
Days Supply

About Oxycodone Hcl: This medication is used to help relieve moderate to severe pain. Show more ▾

Oxycodone belongs to a class of drugs known as opioid analgesics. It works in the brain to change how your body feels and responds to pain. A semisynthetic derivative of CODEINE.

Utilization: claims vs the average CA prescriber

This provider
35
CA average
27.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$94.71
CA average
$127.85

This provider's average cost per claim is below the CA average for this medication.

35.0
30-Day Fills
920
Days Supply

About Fentanyl: This medication is used to help relieve severe ongoing pain (such as due to cancer). Show more ▾

Fentanyl belongs to a class of drugs known as opioid analgesics. It works in the brain to change how your body feels and responds to pain. Do not use the patch form of fentanyl to relieve pain that is mild or that will go away in a few days. This medication is not for occasional (as needed) use. A potent narcotic analgesic, abuse of which leads to habituation or addiction. It is primarily a mu-opioid agonist. Fentanyl is also used as an adjunct to general anesthetics, and as an anesthetic for induction and maintenance. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1078)

Utilization: claims vs the average CA prescriber

This provider
31
CA average
40.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$33.92
CA average
$38.38

This provider's average cost per claim is below the CA average for this medication.

31.0
30-Day Fills
907
Days Supply

About Morphine Sulfate Er: This medication is used to treat severe pain. Show more ▾

Morphine belongs to a class of drugs known as opioid analgesics. It works in the brain to change how your body feels and responds to pain. The principal alkaloid in opium and the prototype opiate analgesic and narcotic. Morphine has widespread effects in the central nervous system and on smooth muscle.

Utilization: claims vs the average CA prescriber

This provider
27
CA average
29.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$7.81
CA average
$11.99

This provider's average cost per claim is below the CA average for this medication.

27.0
30-Day Fills
810
Days Supply

About Naproxen: Naproxen is used to relieve mild to moderate pain from various conditions. Show more ▾

It also reduces pain, swelling, and joint stiffness from arthritis. This medication is known as a nonsteroidal anti-inflammatory drug (NSAID). It works by blocking your body's production of certain natural substances that cause inflammation. If you are treating a chronic condition such as arthritis, ask your doctor about non-drug treatments and/or using other medications to treat your pain. See also Warning section. This form of naproxen is absorbed slowly and should not be used for pain that needs quick relief (such as during a gout attack). Ask your doctor or pharmacist about using a different form of this drug or other medications for quick relief of pain. An anti-inflammatory agent with analgesic and antipyretic properties. Both the acid and its sodium salt are used in the treatment of rheumatoid arthritis and other rheumatic or musculoskeletal disorders, dysmenorrhea, and acute gout.

Utilization: claims vs the average CA prescriber

This provider
22
CA average
29.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$23.74
CA average
$21.13

Gross Part D cost per claim; not the patient's out-of-pocket price.

22.0
30-Day Fills
660
Days Supply

About Methadone Hcl: This medication is used to treat addiction to opioids (such as heroin) as part of an approved treatment program. Show more ▾

Methadone belongs to a class of drugs known as opioid analgesics. It helps prevent withdrawal symptoms caused by stopping other opioids. A synthetic opioid that is used as the hydrochloride. It is an opioid analgesic that is primarily a mu-opioid agonist. It has actions and uses similar to those of MORPHINE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1082-3)

Utilization: claims vs the average CA prescriber

This provider
21
CA average
55.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$16.00
CA average
$13.84

Gross Part D cost per claim; not the patient's out-of-pocket price.

35.0
30-Day Fills
1,039
Days Supply

About Trazodone Hcl: This medication is used to treat depression. Show more ▾

It may help to improve your mood, appetite, and energy level as well as decrease anxiety and insomnia related to depression. Trazodone works by helping to restore the balance of a certain natural chemical (serotonin) in the brain.

Utilization: claims vs the average CA prescriber

This provider
19
CA average
22.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$10.50
CA average
$20.84

This provider's average cost per claim is below the CA average for this medication.

21.0
30-Day Fills
630
Days Supply

About Nortriptyline Hcl: This medication is used to treat mental/mood problems such as depression. Show more ▾

It may help improve mood and feelings of well-being, relieve anxiety and tension, and increase your energy level. This medication belongs to a class of medications called tricyclic antidepressants. It works by affecting the balance of certain natural chemicals (neurotransmitters) in the brain.

Utilization: claims vs the average CA prescriber

This provider
14
CA average
41.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$231.45
CA average
$199.04

Gross Part D cost per claim; not the patient's out-of-pocket price.

14.0
30-Day Fills
420
Days Supply

About Buprenorphine-Naloxone: This medication contains 2 medicines: buprenorphine and naloxone. Show more ▾

It is used to treat opioid dependence/addiction. Buprenorphine belongs to a class of drugs called mixed opioid agonist-antagonists. Buprenorphine helps prevent withdrawal symptoms caused by stopping other opioids. Naloxone is an opioid antagonist that blocks the effect of opioids and can cause severe opioid withdrawal when injected. It has little effect when taken by mouth or dissolved under the tongue. It is combined with buprenorphine to prevent abuse and misuse (injection) of this medication. This combination medication is used as part of a complete treatment program for drug abuse (such as compliance monitoring, counseling, behavioral contract, lifestyle changes). Ask your doctor or pharmacist if you should have other forms of naloxone available to treat opioid overdose. Teach your family or household members about the signs of an opioid overdose and how to treat it.

Utilization: claims vs the average CA prescriber

This provider
11
CA average
25.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$412.76
CA average
$427.41

This provider's average cost per claim is below the CA average for this medication.

11.0
30-Day Fills
330
Days Supply

About Movantik: This medication is used to treat constipation caused by opioid medications in people with ongoing pain that is not caused by cancer. Show more ▾

It blocks the effect of opioids on the gut without blocking the effect on pain. Naloxegol belongs to a class of drugs known as opioid antagonists.

Utilization: claims vs the average CA prescriber

This provider
11
CA average
24.0

Averages are among CA prescribers of this medication. Utilization reflects practice size as well as clinical preference.

Cost per claim: this provider vs the CA average

This provider
$6.06
CA average
$22.47

This provider's average cost per claim is below the CA average for this medication.

11.0
30-Day Fills
330
Days Supply

About Amitriptyline Hcl: This medication is used to treat mental/mood problems such as depression. Show more ▾

It may help improve mood and feelings of well-being, relieve anxiety and tension, help you sleep better, and increase your energy level. This medication belongs to a class of medications called tricyclic antidepressants. It works by affecting the balance of certain natural chemicals (neurotransmitters such as serotonin) in the brain.

No medications match the current filters.
Top Prescribed= this provider's 5 highest-utilization medications. Above Avg. Typical Below Avg.= utilization vs the average CA prescriber of the same drug; volume reflects practice size as well as clinical preference.Green cost= below the CA average cost per claim.

About this data. The prescription history for RAINIER MARK ENRIQUE GUIANG M.D. is compiled from the Centers for Medicare & Medicaid Services (CMS) Medicare Part D Prescriber Public Use File for calendar year 2023, the most recent federal release. Figures cover prescriptions filled for Medicare Part D beneficiaries only; prescriptions under private insurance, Medicaid, or self-pay plans are not included. Because prescribing decisions are generally consistent across coverage types, this record offers a useful view of the overall Pain Medicine prescribing approach at this Riverside, CA practice.

Reading the costs. Drug costs are gross amounts paid to pharmacies under Part D, including both plan and beneficiary payments. They are not the price a patient pays at the pharmacy counter. Medications with fewer than 11 claims are excluded from the federal source data, and state comparisons use the average volume among CA prescribers of the same medication. Always confirm current medications and costs directly with the provider and your plan.