2026 NPPES data Midwife NPI 1417956327 CNM
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MARCIA OKAWA, CNM

Midwife in FOUNTAIN VALLEY, 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
132
Medicare Part D claims · 61 beneficiaries · Midwife avg: 118
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

MARCIA OKAWA, CNM filed 132 Medicare Part D claims in 2023 as a Midwife in FOUNTAIN VALLEY, California, prescribing 91% generic.

132
Part D claims, 2023
91%
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.

MARCIA OKAWA, CNM's Medicare Part D volume vs every U.S. prescriber

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

132 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 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

What does the federal data show about MARCIA OKAWA, CNM?

Quality data not reported

NPI registry status

Active

Issued 07/21/2005

NPI 1417956327

Primary specialty

Midwife

Mid-sized

5,918 US NPIs in this specialty

Medicare Part D claims

132 12% vs specialty avg

2023 prescription claims

Specialty avg: 118

Specialty distribution in California

How Midwife compares to other specialties among California providers

California providers

Midwife share within California

1. Midwife42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Midwife share within California

Specialty board-certification context

Estimated specialty board-certified rate — Midwife (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Midwife ABMS/AOA estimate

Est. board-certified rate (Midwife) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Midwife) — 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).

MARCIA OKAWA, CNM appears in the CMS NPPES registry as a Midwife provider holding CNM credentials at 9940 TALBERT AVE, FOUNTAIN VALLEY, CA, 92708, with a listed phone of (714) 378-6443. NPI 1417956327 was issued on 07/21/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what OKAWA 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 132 prescription claims written by this provider, covering 61 Medicare beneficiaries and totaling roughly $8K in drug spend, split 9% brand-name and 91% 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.

Midwife is a mid-sized specialty nationwide, with 5,918 enrolled providers across 54 states and an average of 118 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

9940 TALBERT AVE
FOUNTAIN VALLEY, CA 92708

Provider Details

NPI 1417956327
Specialty Midwife
Credentials CNM
Gender Female
NPI Issued 07/21/2005

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 MARCIA OKAWA, CNM. To verify MARCIA OKAWA, CNM'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 · Generic-heavy

MARCIA OKAWA, CNM — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 132 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.

132
Total Claims
$8K
Total Drug Cost
61
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
261
Total Day Supply
7,008
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$2K
Generic Drug Cost
$6K
Antibiotic Claims
31

Patient Demographics

Average Patient Age
66.1 years
Avg HCC Risk Score
1.50
Age Distribution
<65: 17, 65-74: 30, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What MARCIA OKAWA, CNM 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
Estradiol
28
Metronidazole
21
Ketoconazole
20

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

Midwife Overview

How MARCIA OKAWA, CNM fits within the Midwife landscape nationally.

5,918
Midwife Providers in US
54
States with Midwife
118
Avg Claims per Provider

MARCIA OKAWA, CNM's 132 claims are above the specialty average of 118.

Nearby Midwife Providers in California

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

Compare Midwife nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARCIA OKAWA, CNM's specialty?
MARCIA OKAWA, CNM specializes in Midwife and practices in FOUNTAIN VALLEY, California. Credentials: CNM.
How much does MARCIA OKAWA, CNM prescribe under Medicare Part D?
In 2023, MARCIA OKAWA, CNM wrote 132 Medicare Part D claims totaling $8K in drug costs for 61 beneficiaries.
Where is MARCIA OKAWA, CNM located?
MARCIA OKAWA, CNM is located at 9940 TALBERT AVE, FOUNTAIN VALLEY, CA, 92708. Phone: (714) 378-6443.
What is MARCIA OKAWA, CNM's NPI number?
MARCIA OKAWA, CNM's National Provider Identifier (NPI) is 1417956327, issued on 07/21/2005.
Does MARCIA OKAWA, CNM prescribe more brand-name or generic drugs?
MARCIA OKAWA, CNM's prescribing is 9% brand-name and 91% generic drugs by claim count, with $2K in brand drug costs.
How many Midwife providers are there in the US?
There are 5,918 Midwife providers across 54 states in the US. The average Midwife provider writes 118 Medicare Part D claims per year.
What drugs does MARCIA OKAWA, CNM prescribe most often?
Based on 2023 Medicare Part D data, MARCIA OKAWA, CNM's most frequently prescribed drugs include Estradiol, Metronidazole, Ketoconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARCIA OKAWA, CNM accept Medicare?
MARCIA OKAWA, CNM appears in CMS Medicare data with 132 Part D claims and 61 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARCIA OKAWA, CNM's credentials?
MARCIA OKAWA, CNM's NPI is 1417956327 with credentials CNM. 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