DR. TAMARA GRISALES M.D.
NPI 1063611762
Obstetrics & Gynecology in Los Angeles, CA

Q: What is Tamara Grisales's NPI number?

The NPI number for Tamara Grisales is 1063611762. It was assigned to this individual provider in the NPPES registry on July 12, 2007. The provider is also known as Dr. Tamara G. Hartshorn.

Q: What is Tamara Grisales's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Q: When was this NPI record last updated?

The NPPES record for Tamara Grisales was last updated on October 15, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 12, 2007PECOS EnrolledAccepts Medicare Assignment

77.34/100

CMS Quality Rating

200 UCLA MEDICAL PLZ STE 140, LOS ANGELES, CA 90095(310) 794-7274 Get Directions Write a Review

NPPES record last updated: October 15, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Tamara Grisales M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. TAMARA GRISALES M.D. (NPI 1063611762) is an individual obstetrics & gynecology provider in Los Angeles, California, licensed in California (A108105) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS, maintains a secondary practice location in Sylmar, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1063611762

Entity TypeIndividualFemale

Primary Taxonomy207V00000X

Provider Legal NameDR. TAMARA GRISALESCredential: M.D.

Location Address200 UCLA MEDICAL PLZ STE 140Los Angeles, CA 90095-1437

Mailing Address5767 W Century Blvd, Suite 400Los Angeles, CA 90045-5631 · (310) 301-8707

Phone(310) 794-7274

Sole ProprietorYes

Medical School CMSOtherGraduated 2007

Enumeration DateJuly 12, 2007

Last NPPES UpdateOctober 15, 2024

NPPES CertifiedOctober 10, 2024

✔ NPI 1063611762 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

License✔ Licensed in CA · A108105

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

Also ListedObstetrics & Gynecology · Urogynecology and Reconstructive Pelvic SurgeryTaxonomy 207VF0040X · License A108105 (CA)

200 UCLA MEDICAL PLZ STE 140, Los Angeles, CA 90095

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Other Names 1

Former Name (1)Dr. Tamara G. Hartshorn

Secondary Practice Location 1

Location 114445 Olive View Dr Rm 6B119-HSylmar, CA 91342-1437 · Phone (818) 364-3031

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Tamara Grisales M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID749458149

PECOS Enrollment IDI20110728000562

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Tamara Grisales reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Regents Of The University Of California

0.5 mi

Obstetrics & Gynecology

200 MEDICAL PLAZA, SUITE 430
Los Angeles, CA 90095

Reassigned Medicare billing, California enrollment
92 clinicians in this Medicare group

NPI 1073582888 (310) 794-8282

County Of Los Angeles

3.1 mi

Public Health, State or Local

2509 PICO BLVD
Santa Monica, CA 90405

Reassigned Medicare billing, California enrollment
1,939 clinicians in this Medicare group

NPI 1235323080 (310) 998-3203

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 21

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, onabotulinumtoxina, 1 unit J0585

Onabotulinumtoxina, also known as Botox, is a medication injected into muscles. It's used to treat various conditions by blocking nerve activity in the muscles, causing a temporary reduction in muscle activity. The units refer to the dosage.

1,140 services11 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This 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.

427 services302 patients

Ultrasound measurement of bladder capacity after voiding 51798

Ultrasound measurement of bladder capacity after voiding is a non-invasive test that uses sound waves to create images of your bladder. It's done after you've emptied your bladder to see if there's any leftover urine, which can help diagnose certain conditions.

153 services143 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

86 services86 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This 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.

78 services61 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This 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.

62 services58 patients

Pessary, reusable, non rubber, any type A4562

A pessary is a device placed in the body to support areas that have dropped due to age or childbirth. It's made of non-rubber material. It's inserted and removed by a healthcare professional. Regular check-ups are needed to ensure comfort and proper function.

44 services32 patients

Fitting and insertion of vaginal support device 57160

A vaginal support device is a medical tool used to provide support to pelvic organs. During the procedure, a healthcare professional will gently place the device into the appropriate area. This is typically done in a clinical setting and can help with various health conditions.

43 services32 patients

Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina 76830

An ultrasound scan of the lower abdominal region is a safe, non-invasive procedure that uses sound waves to create images of internal structures. This helps in checking the health of reproductive organs and detecting any abnormalities. The scan is done via a small probe inserted into the body.

30 services27 patients

Electronic assessment of bladder emptying 51741

Electronic assessment of bladder emptying is a non-invasive test that measures how well your bladder functions. It uses ultrasound technology to create images of your bladder before and after you use the restroom, helping to identify any issues with bladder emptying.

28 services27 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This 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.

27 services27 patients

Injectable bulking agent, synthetic implant, urinary tract, 1 ml syringe, includes shipping and necessary supplies L8606

An injectable bulking agent is a synthetic implant used to improve the function of your urinary tract. It's administered via a 1 ml syringe. The cost includes shipping and all necessary supplies. It's a common, non-invasive procedure to enhance urinary control.

27 services11 patients

Diagnostic exam of bladder and urethra using an endoscope 52000

This procedure involves using a thin, flexible tube with a light, called an endoscope, to examine the bladder and urethra. It helps in identifying any abnormalities or issues that may be causing discomfort or other symptoms.

22 services22 patients

Insertion of temporary bladder tube 51701

This procedure involves placing a small tube into your lower abdomen to help drain urine from your bladder. It's a temporary measure, often used when normal urination is not possible. The tube remains in place until you can urinate on your own again.

16 services16 patients

Injection of implant material beneath lining of bladder and/or urethra using an endoscope 51715

This is a procedure where a substance is inserted under the bladder or urethra lining using a special instrument called an endoscope. This helps to support these areas and improve their function. It's done in a safe, controlled medical environment.

13 services11 patients

Injection procedure for imaging of bladder during voiding 51600

This procedure involves injecting a safe, contrasting material into your bladder through a small tube. This helps capture clear images during voiding. The process helps doctors understand your bladder's function better and identify any potential issues.

12 services12 patients

Complex measurement of pressure of urine flow in bladder with voiding pressure studies 51728

This procedure measures the pressure in your bladder as it fills and empties. It helps to understand how well your bladder is functioning. Sensors record pressure levels during these processes, providing valuable data for your doctor.

11 services11 patients

Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings 51784

This procedure involves the use of non-invasive devices to record the electrical activity of muscles at specific body openings. It's helpful in understanding muscle function and can assist in diagnosing certain conditions.

11 services11 patients

Insertion of device into abdomen with pressure and urine flow rate study 51797

This procedure involves placing a small device into your abdomen to monitor pressure and urine flow rates. It helps in understanding how well your body is processing and eliminating liquid waste. It's a safe procedure, typically performed under local anesthesia.

11 services11 patients

Exam with injections of chemical for destruction of bladder using an endoscope 52287

This procedure involves the use of a thin, flexible tube with a light (endoscope) for internal examination. A chemical is then injected to help eliminate specific issues in the bladder. It's a standard and safe process.

11 services11 patients

Review by radiologist of urinary bladder and urethra images with contrast and after passing urine 74455

This procedure involves a specialist examining images of your bladder and urine passage. A contrast agent helps highlight these areas better. After you empty your bladder, another set of images is taken for comparison. This helps identify any abnormalities.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90095 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

77.34/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

84.55

Promoting Interoperability

100

Improvement Activities

Cost

39.93

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Intermittent urinary catheter; straight tip, with or without coating (teflon, silicone, silicone elastomer, or hydrophilic, etc.), each A4351

DME-Orthotic Devices · category DF008N

1 supplier19 claims4,230 services$1.42 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SEAN JIN HYUK LEE PA-C

Physician Assistant