2026 NPPES data Maternal & Fetal Medicine Physician NPI 1548358344 M.D.
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MARIA RODRIGUEZ, M.D.

Maternal & Fetal Medicine Physician in WEST COVINA, 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
266
Medicare Part D claims · 12 beneficiaries · Maternal & Fetal Medicine Physician avg: 75
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

MARIA RODRIGUEZ, M.D. filed 266 Medicare Part D claims in 2023 as a Maternal & Fetal Medicine Physician in WEST COVINA, California, prescribing 89% generic.

266
Part D claims, 2023
89%
generic prescribing

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

MARIA RODRIGUEZ, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

266 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board-eligible specialty (heuristic — not verified)

MARIA RODRIGUEZ, M.D. 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).

What does the federal data show about MARIA RODRIGUEZ, M.D.?

Quality data not reported

NPI registry status

Active

Issued 10/10/2006

NPI 1548358344

Primary specialty

Maternal & Fetal Medicine Physician

Niche

2,103 US NPIs in this specialty

Medicare Part D claims

266 255% vs specialty avg

2023 prescription claims

Specialty avg: 75

Specialty distribution in California

How Maternal & Fetal Medicine Physician compares to other specialties among California providers

California providers

Maternal & Fetal Medicine Physician share within California

1. Maternal & Fetal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Maternal & Fetal Medicine Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Maternal & Fetal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Maternal & Fetal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Maternal & Fetal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Maternal & Fetal Medicine 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).

MARIA RODRIGUEZ, M.D. appears in the CMS NPPES registry as a Maternal & Fetal Medicine Physician provider holding M.D. credentials at 1135 S SUNSET AVE STE 402, WEST COVINA, CA, 91790, with a listed phone of (626) 337-4425. NPI 1548358344 was issued on 10/10/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what RODRIGUEZ 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 266 prescription claims written by this provider, covering 12 Medicare beneficiaries and totaling roughly $20K in drug spend, split 11% brand-name and 89% 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.

Maternal & Fetal Medicine Physician is a narrow specialty nationwide, with 2,103 enrolled providers across 52 states and an average of 75 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

1135 S SUNSET AVE STE 402
WEST COVINA, CA 91790

Provider Details

NPI 1548358344
Specialty Maternal & Fetal Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 10/10/2006

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 MARIA RODRIGUEZ, M.D.. To verify MARIA RODRIGUEZ, M.D.'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

MARIA RODRIGUEZ, M.D. — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 266 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.

266
Total Claims
$20K
Total Drug Cost
12
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
327
Total Day Supply
9,539
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$13K
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
64.8 years
Avg HCC Risk Score
0.85

Top Prescribed Drugs (Medicare Part D)

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

What MARIA RODRIGUEZ, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Metoprolol Tartrate
21
Levothyroxine Sodium
19
Amlodipine Besylate
18
Atorvastatin Calcium
15
Naproxen
13
Esomeprazole Magnesium
12
Gabapentin
12
Metformin Hcl
12
Allopurinol
11
Doxazosin Mesylate
11

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

Maternal & Fetal Medicine Physician Overview

How MARIA RODRIGUEZ, M.D. fits within the Maternal & Fetal Medicine Physician landscape nationally.

2,103
Maternal & Fetal Medicine Physician Providers in US
52
States with Maternal & Fetal Medicine Physician
75
Avg Claims per Provider

MARIA RODRIGUEZ, M.D.'s 266 claims are above the specialty average of 75.

Nearby Maternal & Fetal Medicine Physician Providers in California

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

Compare Maternal & Fetal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARIA RODRIGUEZ, M.D.'s specialty?
MARIA RODRIGUEZ, M.D. specializes in Maternal & Fetal Medicine Physician and practices in WEST COVINA, California. Credentials: M.D..
How much does MARIA RODRIGUEZ, M.D. prescribe under Medicare Part D?
In 2023, MARIA RODRIGUEZ, M.D. wrote 266 Medicare Part D claims totaling $20K in drug costs for 12 beneficiaries.
Where is MARIA RODRIGUEZ, M.D. located?
MARIA RODRIGUEZ, M.D. is located at 1135 S SUNSET AVE STE 402, WEST COVINA, CA, 91790. Phone: (626) 337-4425.
What is MARIA RODRIGUEZ, M.D.'s NPI number?
MARIA RODRIGUEZ, M.D.'s National Provider Identifier (NPI) is 1548358344, issued on 10/10/2006.
Does MARIA RODRIGUEZ, M.D. prescribe more brand-name or generic drugs?
MARIA RODRIGUEZ, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $13K in brand drug costs.
How many Maternal & Fetal Medicine Physician providers are there in the US?
There are 2,103 Maternal & Fetal Medicine Physician providers across 52 states in the US. The average Maternal & Fetal Medicine Physician provider writes 75 Medicare Part D claims per year.
What drugs does MARIA RODRIGUEZ, M.D. prescribe most often?
Based on 2023 Medicare Part D data, MARIA RODRIGUEZ, M.D.'s most frequently prescribed drugs include Metoprolol Tartrate, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARIA RODRIGUEZ, M.D. accept Medicare?
MARIA RODRIGUEZ, M.D. appears in CMS Medicare data with 266 Part D claims and 12 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARIA RODRIGUEZ, M.D.'s credentials?
MARIA RODRIGUEZ, M.D.'s NPI is 1548358344 with credentials M.D.. 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