2026 NPPES data Clinical Biochemical Genetics Physician NPI 1245204635 M.D.
Verify on CMS →

JOHN MERRITT, M.D.

Clinical Biochemical Genetics Physician in SEATTLE, Washington. 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
14
Medicare Part D claims · Clinical Biochemical Genetics Physician avg: 46
Generic prescribing
0%
generic claims · 100% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JOHN MERRITT, M.D. filed 14 Medicare Part D claims in 2023 as a Clinical Biochemical Genetics Physician in SEATTLE, Washington, prescribing 0% generic.

14
Part D claims, 2023
0%
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.

JOHN MERRITT, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

14 0th percentile higher than 0% 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

Board-eligible specialty (heuristic — not verified)

JOHN MERRITT, 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 JOHN MERRITT, M.D.?

Quality data not reported

NPI registry status

Active

Issued 02/14/2006

NPI 1245204635

Primary specialty

Clinical Biochemical Genetics Physician

Rare

82 US NPIs in this specialty

Medicare Part D claims

14 70% vs specialty avg

2023 prescription claims

Specialty avg: 46

Specialty distribution in Washington

How Clinical Biochemical Genetics Physician compares to other specialties among Washington providers

Washington providers

Clinical Biochemical Genetics Physician share within Washington

1. Clinical Biochemical Genetics Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Clinical Biochemical Genetics Physician share within Washington

Specialty board-certification context

Estimated specialty board-certified rate — Clinical Biochemical Genetics Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Clinical Biochemical Genetics Physician ABMS/AOA estimate

Est. board-certified rate (Clinical Biochemical Genetics Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Clinical Biochemical Genetics 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).

JOHN MERRITT, M.D. appears in the CMS NPPES registry as a Clinical Biochemical Genetics Physician provider holding M.D. credentials at 4800 SAND POINT WAY NE, SEATTLE, WA, 98105, with a listed phone of (206) 987-2000. NPI 1245204635 was issued on 02/14/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MERRITT 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 14 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $124K in drug spend, split 100% brand-name and 0% 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.

Clinical Biochemical Genetics Physician is a narrow specialty nationwide, with 82 enrolled providers across 28 states and an average of 46 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

4800 SAND POINT WAY NE
SEATTLE, WA 98105

Provider Details

NPI 1245204635
Specialty Clinical Biochemical Genetics Physician
Credentials M.D.
Gender Male
NPI Issued 02/14/2006

License & disciplinary context — Washington WMC 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 ~34K Washington medical licensees in 2023 — they are NOT specific to JOHN MERRITT, M.D.. To verify JOHN MERRITT, M.D.'s current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases

WMC 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 Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Brand-heavy

JOHN MERRITT, M.D. — brand share 100.0%
Specialty average (est.)

100% brand-name claims vs 0% generic, on 14 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.

14
Total Claims
$124K
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
14
Total Day Supply
346
Brand vs Generic
100% brand / 0% generic
Brand Drug Cost
$124K
Generic Drug Cost
$0

Patient Demographics

Average Patient Age
59.0 years
Avg HCC Risk Score
0.80

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Cystadane
Betaine
12

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

Clinical Biochemical Genetics Physician Overview

How JOHN MERRITT, M.D. fits within the Clinical Biochemical Genetics Physician landscape nationally.

82
Clinical Biochemical Genetics Physician Providers in US
28
States with Clinical Biochemical Genetics Physician
46
Avg Claims per Provider

JOHN MERRITT, M.D.'s 14 claims are below the specialty average of 46.

Nearby Clinical Biochemical Genetics Physician Providers in Washington

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

Compare Clinical Biochemical Genetics Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JOHN MERRITT, M.D.'s specialty?
JOHN MERRITT, M.D. specializes in Clinical Biochemical Genetics Physician and practices in SEATTLE, Washington. Credentials: M.D..
How much does JOHN MERRITT, M.D. prescribe under Medicare Part D?
In 2023, JOHN MERRITT, M.D. wrote 14 Medicare Part D claims totaling $124K in drug costs for N/A beneficiaries.
Where is JOHN MERRITT, M.D. located?
JOHN MERRITT, M.D. is located at 4800 SAND POINT WAY NE, SEATTLE, WA, 98105. Phone: (206) 987-2000.
What is JOHN MERRITT, M.D.'s NPI number?
JOHN MERRITT, M.D.'s National Provider Identifier (NPI) is 1245204635, issued on 02/14/2006.
Does JOHN MERRITT, M.D. prescribe more brand-name or generic drugs?
JOHN MERRITT, M.D.'s prescribing is 100% brand-name and 0% generic drugs by claim count, with $124K in brand drug costs.
How many Clinical Biochemical Genetics Physician providers are there in the US?
There are 82 Clinical Biochemical Genetics Physician providers across 28 states in the US. The average Clinical Biochemical Genetics Physician provider writes 46 Medicare Part D claims per year.
What drugs does JOHN MERRITT, M.D. prescribe most often?
Based on 2023 Medicare Part D data, JOHN MERRITT, M.D.'s most frequently prescribed drugs include Cystadane. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOHN MERRITT, M.D. accept Medicare?
JOHN MERRITT, M.D. appears in CMS Medicare data with 14 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOHN MERRITT, M.D.'s credentials?
JOHN MERRITT, M.D.'s NPI is 1245204635 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