2026 NPPES data Obstetrics & Gynecology Physician NPI 1679622872 MD
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MEHRNOOSH ALMASSI, MD

Obstetrics & Gynecology Physician in WALNUT CREEK, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
337
Medicare Part D claims · 111 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$22.15
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: MEHRNOOSH ALMASSI, MD is a Obstetrics & Gynecology Physician ([object Object]) practicing in WALNUT CREEK, California with a Medicare Part D prescribing footprint of 337 claims across 111 beneficiaries — 22% brand-name prescribing . Industry payments of $22.15 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: MEHRNOOSH ALMASSI, MD filed 337 Medicare Part D claims in 2023 across WALNUT CREEK, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

MEHRNOOSH ALMASSI, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

MEHRNOOSH ALMASSI, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 01/09/2007

NPI 1679622872

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

337 88% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in California

How Obstetrics & Gynecology Physician compares to other specialties among California providers

California providers

Obstetrics & Gynecology Physician share within California

1. Obstetrics & Gynecology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Obstetrics & Gynecology Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Obstetrics & Gynecology Physician ABMS/AOA estimate

Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

MEHRNOOSH ALMASSI, MD is a Obstetrics & Gynecology Physician provider practicing in WALNUT CREEK, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1679622872. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

MEHRNOOSH ALMASSI, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 1840 SAN MIGUEL DR STE 100, WALNUT CREEK, CA, 94596, with a listed phone of (925) 356-8990. NPI 1679622872 was issued on 01/09/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ALMASSI most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 337 prescription claims written by this provider, covering 111 Medicare beneficiaries and totaling roughly $48K in drug spend, split 22% brand-name and 78% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1840 SAN MIGUEL DR STE 100
WALNUT CREEK, CA 94596

Provider Details

NPI 1679622872
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Female
NPI Issued 01/09/2007

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for MEHRNOOSH ALMASSI, MD. Source: openpaymentsdata.cms.gov.

Total received

$22

Largest payer

Sumitomo Pharma America, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context — California MBC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 — they are NOT specific to MEHRNOOSH ALMASSI, MD. To verify MEHRNOOSH ALMASSI, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

MEHRNOOSH ALMASSI, MD — brand share 22.0%
Specialty average (est.)

22% brand-name claims vs 78% generic, on 337 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

337
Total Claims
$48K
Total Drug Cost
111
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
620
Total Day Supply
16,183
Brand vs Generic
22% brand / 78% generic
Brand Drug Cost
$34K
Generic Drug Cost
$13K
Antibiotic Claims
28

Patient Demographics

Average Patient Age
71.3 years
Avg HCC Risk Score
0.91
Gender Split
100% female / 0% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Estradiol
42
Imvexxy
Estradiol
30
Fluconazole
22
Valacyclovir
Valacyclovir Hcl
22
Yuvafem
Estradiol
21
Triamcinolone Acetonide
15
Medroxyprogesterone Acetate
14
Clobetasol Propionate
12
Myrbetriq
Mirabegron
11
Nitrofurantoin Mono-Macro
Nitrofurantoin Monohyd/M-Cryst
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Obstetrics & Gynecology Physician Overview

How MEHRNOOSH ALMASSI, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

MEHRNOOSH ALMASSI, MD's 337 claims are above the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as ALMASSI.

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MEHRNOOSH ALMASSI, MD's specialty?
MEHRNOOSH ALMASSI, MD specializes in Obstetrics & Gynecology Physician and practices in WALNUT CREEK, California. Credentials: MD.
How much does MEHRNOOSH ALMASSI, MD prescribe under Medicare Part D?
In 2023, MEHRNOOSH ALMASSI, MD wrote 337 Medicare Part D claims totaling $48K in drug costs for 111 beneficiaries.
Where is MEHRNOOSH ALMASSI, MD located?
MEHRNOOSH ALMASSI, MD is located at 1840 SAN MIGUEL DR STE 100, WALNUT CREEK, CA, 94596. Phone: (925) 356-8990.
What is MEHRNOOSH ALMASSI, MD's NPI number?
MEHRNOOSH ALMASSI, MD's National Provider Identifier (NPI) is 1679622872, issued on 01/09/2007.
Does MEHRNOOSH ALMASSI, MD prescribe more brand-name or generic drugs?
MEHRNOOSH ALMASSI, MD's prescribing is 22% brand-name and 78% generic drugs by claim count, with $34K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does MEHRNOOSH ALMASSI, MD prescribe most often?
Based on 2023 Medicare Part D data, MEHRNOOSH ALMASSI, MD's most frequently prescribed drugs include Estradiol, Imvexxy, Fluconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MEHRNOOSH ALMASSI, MD accept Medicare?
MEHRNOOSH ALMASSI, MD appears in CMS Medicare data with 337 Part D claims and 111 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MEHRNOOSH ALMASSI, MD's credentials?
MEHRNOOSH ALMASSI, MD's NPI is 1679622872 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology