WILLIAM L PHELPS II M.D.
NPI 1578515458
Internal Medicine - Geriatric Medicine in Green Valley, AZ
NPI Status: Active since May 17, 2006
Contact Information
101 W. DUVAL RD
SUITE 101
GREEN VALLEY, AZ
ZIP 85614
Phone: (520) 625-2950
Fax: (520) 625-2997
NPPES record last updated: November 13, 2007. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Male
- Internal Medicine
- Geriatric Medicine
- Medicare Quality Reporting
About WILLIAM PHELPS
This page provides the complete NPI Profile along with additional information for William Phelps, an internist established in Green Valley, Arizona with a medical specialization in Internal Medicine, focusing in geriatric medicine . The healthcare provider is registered in the NPI registry with number 1578515458 assigned on May 2006. The practitioner's primary taxonomy code is 207RG0300X with license number 24727 (AZ). The provider is registered as an individual and his NPI record was last updated 19 years ago.
- NPI
- 1578515458
- Provider Name
- WILLIAM L PHELPS II M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 101 W. DUVAL RD SUITE 101 GREEN VALLEY, AZ 85614
- Location Phone
- (520) 625-2950
- Location Fax
- (520) 625-2997
- Mailing Address
- 101 W. DUVAL RD SUITE 101 GREEN VALLEY, AZ 85614
- Mailing Phone
- (520) 625-2950
- Mailing Fax
- (520) 625-2997
- Is Sole Proprietor?
- No
- Enumeration Date
- 05-17-2006
- Last Update Date
- 11-13-2007
- Code Navigator
An internist like William Phelps is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Internal Medicine Geriatric Medicine
- Taxonomy Code
- 207RG0300X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 24727
- License State
- AZ
- Taxonomy Description
- An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| G47605 | MEDICARE UPIN (02) | AZ |
Areas of Expertise
The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.
Administration of influenza virus vaccine
Aspiration and/or injection of fluid from large joint
Aspiration and/or injection of fluid from medium joint
Blood test, clotting time
Destruction of precancer skin growth, 1 growth
Established patient office or other outpatient visit, 10-19 minutes
Established patient office or other outpatient visit, 20-29 minutes
Established patient office or other outpatient visit, 30-39 minutes
Established patient office or other outpatient visit, 40-54 minutes
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage
Injection of anesthetic agent and/or steroid into lower back and leg nerve
Injection of drug or substance under skin or into muscle
Injection, ceftriaxone sodium, per 250 mg
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg
New patient office or other outpatient visit, 60-74 minutes
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and
Removal of impacted ear wax by washing
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
Urinalysis, manual test
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
This service was performed 111 times for 111 patientsThis procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.
This service was performed 104 times for 74 patientsThis procedure involves a needle being inserted into a medium-sized joint, such as a knee or shoulder, to remove (aspirate) excess fluid. Sometimes, medication may also be injected into the joint to reduce inflammation and pain.
This service was performed 24 times for 22 patientsA clotting time blood test helps determine how quickly your blood forms clots, a process crucial to stop bleeding. During the test, a small blood sample is taken from your arm. The sample is then analyzed in a lab to see how long it takes for a clot to form.
This service was performed 177 times for 18 patients"Destruction of precancer skin growth" is a procedure that eliminates a single precancerous skin growth. This is done to prevent it from developing into skin cancer. The growth may be removed using various methods such as cryotherapy (freezing), laser therapy, or topical medications.
This service was performed 14 times for 14 patientsThis is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
This service was performed 391 times for 207 patientsThis is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
This service was performed 1,988 times for 613 patientsThis is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
This service was performed 58 times for 54 patientsThis service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
This service was performed 296 times for 291 patientsThe quadrivalent inactivated influenza vaccine is a shot given to protect against four strains of the flu virus. This 0.5 ml dosage helps your body develop immunity to the virus. It's an important step in preventing flu-related complications.
This service was performed 111 times for 111 patientsThis procedure involves injecting an anesthetic or steroid into the lower back and leg nerve to alleviate pain. The injection helps reduce inflammation and numb the area, providing relief from discomfort. This is a common treatment for conditions such as sciatica and herniated discs.
This service was performed 21 times for 18 patientsThis procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
This service was performed 460 times for 162 patientsCeftriaxone sodium is an antibiotic injection used to treat a variety of bacterial infections. Each injection contains 250 mg of the medicine. It works by stopping the growth of bacteria in your body.
This service was performed 581 times for 42 patientsTriamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.
This service was performed 1,903 times for 172 patientsThis is a procedure where a small dose of Vitamin B-12, also known as Cyanocobalamin, is injected into your body. This vitamin is essential for nerve function and the production of red blood cells. It's often used to treat vitamin B-12 deficiency.
This service was performed 27 times for 26 patientsThis is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
This service was performed 26 times for 26 patientsThis is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.
This service was performed 62 times for 40 patientsImpacted ear wax removal by washing, also known as ear irrigation, involves using a pressurized flow of water to break up and dislodge the ear wax. This safe procedure helps restore normal hearing and relieve discomfort caused by the blockage.
This service was performed 44 times for 40 patientsAn electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
This service was performed 19 times for 17 patientsA urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.
This service was performed 83 times for 60 patientsQuality Reporting
The provider participated in CMS Quality Payment Program. The Quality Payment Program aims to improve population health, reduce costs and improve the care received by Medicare beneficiaries. The following quality measures meet Medicare's statistical reporting standards. Not all providers report the same information, because not all providers give the same services to patients. The quality information is just a snapshot of some the care providers give to their patients. Reporting more or less information is not a reflection of quality.
| Quality Measure | Performance | Number of Patients |
|---|---|---|
| Annual registration in the Prescription Drug Monitoring Program | Yes | N/A |
| Annual registration by eligible clinician or group in the prescription drug monitoring program of the state where they practice. Activities that simply involve registration are not sufficient. MIPS eligible clinicians and groups must participate for a minimum of 6 months. | ||
| Clinical Data Registry Reporting | Yes | N/A |
| The MIPS eligible clinician is in active engagement to submit data to a clinical data registry. To earn a 5 % bonus in the promoting interoperability performance category score for submitting to one or more public health or clinical data registries also attest to PI_PHCDRR_5_MULTI. | ||
| Clinical Information Reconciliation | 87% | 143 |
| For at least one transition of care or referral received or patient encounter in which the MIPS eligible clinician has never before encountered the patient, the MIPS eligible clinician performs clinical information reconciliation. The MIPS eligible clinician must implement clinical information reconciliation for the following three clinical information sets: (1) Medication. Review of the patient's medication, including the name, dosage, frequency, and route of each medication. (2) Medication allergy. Review of the patient's known medication allergies. (3) Current Problem list. Review of the patient's current and active diagnoses. | ||
| Closing the Referral Loop: Receipt of Specialist Report | 81% | 72 |
| Percentage of patients with referrals, regardless of age, for which the referring provider receives a report from the provider to whom the patient was referred | ||
| Completion of CDC Training on Antibiotic Stewardship | Yes | N/A |
| Completion of all modules of the Centers for Disease Control and Prevention antibiotic stewardship course. Note: This activity may be selected once every 4 years, to avoid duplicative information given that some of the modules may change on a year by year basis but over 4 years there would be a reasonable expectation for the set of modules to have undergone substantive change, for the improvement activities performance category score. | ||
| Diabetes Mellitus: Diabetic Foot and Ankle Care, Peripheral Neuropathy - Neurological Evaluation | 91% | 44 |
| Percentage of patients aged 18 years and older with a diagnosis of diabetes mellitus who had a neurological examination of their lower extremities within 12 months | ||
| Diabetes: Eye Exam | 72% | 43 |
| Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period | ||
| Documentation of Current Medications in the Medical Record | 84% | 4553 |
| Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter. This list must include ALL known prescriptions, over-the-counters, herbals, and vitamin/mineral/dietary (nutritional) supplements AND must contain the medications' name, dosage, frequency and route of administration | ||
| e-Prescribing | 93% | 358 |
| At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology. | ||
| Immunization Registry Reporting | Yes | N/A |
| The MIPS eligible clinician is in active engagement with a public health agency to submit immunization data and receive immunization forecasts and histories from the public health immunization registry/immunization information system (IIS). | ||
| Implementation of Use of Specialist Reports Back to Referring Clinician or Group to Close Referral Loop | Yes | N/A |
| Performance of regular practices that include providing specialist reports back to the referring individual MIPS eligible clinician or group to close the referral loop or where the referring individual MIPS eligible clinician or group initiates regular inquiries to specialist for specialist reports which could be documented or noted in the EHR technology. | ||
| Patient-Specific Education | 0% | 853 |
| The MIPS eligible clinician must use clinically relevant information from certified EHR technology to identify patient-specific educational resources and provide electronic access to those materials to at least one unique patient seen by the MIPS eligible clinician. | ||
| Provide Patient Access | 2% | 941 |
| For at least one unique patient seen by the MIPS eligible clinician: (1) The patient (or the patient authorized representative) is provided timely access to view online, download, and transmit his or her health information; and (2) The MIPS eligible clinician ensures the patient's health information is available for the patient (or patient-authorized representative) to access using any application of their choice that is configured to meet the technical specifications of the Application Programing Interface (API) in the MIPS eligible clinician's certified EHR technology. | ||
| Public Health Registry Reporting | Yes | N/A |
| The MIPS eligible clinician is in active engagement with a public health agency to submit data to public health registries. To earn a 5 % bonus in the promoting interoperability performance category score for submitting to one or more public health or clinical data registries also attest to PI_PHCDRR_4_MULTI. | ||
| Secure Messaging | 54% | 941 |
| For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of certified EHR technology to the patient (or the patient-authorized representative), or in response to a secure message sent by the patient (or the patient-authorized representative). | ||
| Security Risk Analysis | Yes | N/A |
| Conduct or review a security risk analysis in accordance with the requirements in 45 CFR 164.308(a)(1), including addressing the security (to include encryption) of ePHI data created or maintained by certified EHR technology in accordance with requirements in 45 CFR164.312(a)(2)(iv) and 45 CFR 164.306(d)(3), and implement security updates as necessary and correct identified security deficiencies as part of the MIPS eligible clinician's risk management process. | ||
| Send a Summary of Care | 2% | 161 |
| For at least one transition of care or referral, the MIPS eligible clinician that transitions or refers their patient to another setting of care or health care provider-(1) creates a summary of care record using certified EHR technology; and (2) electronically exchanges the summary of care record. | ||
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NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1578515458, we treat the final digit (8) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 52. The final step is to find the difference between that total and the next multiple of ten (60 - 52 = 8).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 52 is 60. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1578515458, enumerated as an "individual" on May 17, 2006.
The provider is located at 101 W. DUVAL RD SUITE 101 GREEN VALLEY, AZ 85614 and the phone number is (520) 625-2950.
Internal Medicine with taxonomy code 207RG0300X and a focus in Geriatric Medicine.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.
