JENNIFER GRAYZAR M.D.
NPI 1336160530
Emergency Medicine in San Rafael, CA

Q: What is Jennifer Grayzar's NPI number?

The NPI number for Jennifer Grayzar is 1336160530. It was assigned to this individual provider in the NPPES registry on July 22, 2006.

Q: What is Jennifer Grayzar's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Jennifer Grayzar was last updated on August 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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 22, 2006PECOS Enrolled

94.62/100

CMS Quality Rating

4000 CIVIC CENTER DR STE 206, SAN RAFAEL, CA 94903(415) 925-8865 Get Directions Write a Review

NPPES record last updated: August 13, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Jennifer Grayzar M.d. NPPES

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

JENNIFER GRAYZAR M.D. (NPI 1336160530) is an individual emergency medicine provider in San Rafael, California, licensed in California (A65858) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in Concord, and is a graduate of Ohio State University College Of Medicine (1994).

NPPES Registry Identity

NPI1336160530

Entity TypeIndividualFemale

Primary Taxonomy207P00000X

Provider Legal NameJENNIFER GRAYZARCredential: M.D.

Location Address4000 CIVIC CENTER DR STE 206San Rafael, CA 94903-5233

Mailing Address2100 Powell St, Suite 900Emeryville, CA 94608-1826 · (510) 350-2600 · Fax (510) 879-9100

Phone(415) 925-8865

Sole ProprietorNo

Medical School CMSOhio State University College Of MedicineGraduated 1994

Enumeration DateJuly 22, 2006

Last NPPES UpdateAugust 13, 2025

NPPES CertifiedAugust 13, 2025

✔ NPI 1336160530 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in CA · A65858

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

4000 CIVIC CENTER DR STE 206, San Rafael, CA 94903

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Secondary Practice Location 1

Location 12540 East StConcord, CA 94520-1906 · Phone (925) 682-8200

Other Identifiers 1

Medicaid00A658580CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Jennifer Grayzar M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8729159256

PECOS Enrollment IDI20080611000308

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 Jennifer Grayzar reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America - California

3.9 mi

Emergency Medicine

250 BON AIR RD
Greenbrae, CA 94904

Reassigned Medicare billing, California enrollment
2,323 clinicians in this Medicare group

NPI 1417975319 (415) 925-7000

Regents Univ Of California Ucsf

17 mi

Internal Medicine

505 PARNASSUS AVE
San Francisco, CA 94143

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

NPI 1124439807 (415) 476-1000

Stat Med PC A California Medical Professional Corporation

23 mi

Urgent Care

3799 MT DIABLO BLVD STE 100
Lafayette, CA 94549

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

NPI 1891132106 (925) 297-6396

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 4

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.

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

417 services404 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

132 services129 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

94 services87 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

81 services80 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94903 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

$104.67 typical visit price

range $69.07 – $202.63

Typical copayment $26.16 (range $17.26 – $50.65)

Most-billed visit code 99203

Established Patient

$119.61 typical visit price

range $23.44 – $166.64

Typical copayment $29.90 (range $5.86 – $41.66)

Most-billed visit code 99214

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.

94.62/100

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

Scored as part of a group practice

Quality

76.67

Improvement Activities

Cost

97.14

Other Providers at the Same Location NPPES 6

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

REGENTS OF THE UNIVERSITY OF CALIFORNIA

Clinic/Center (Rehabilitation)