2026 NPPES data Family Medicine Physician NPI 1689163990
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JOASH KEMEI

Family Medicine Physician in MERCED, 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
5K
Medicare Part D claims · 331 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$122
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

JOASH KEMEI filed 5,230 Medicare Part D claims in 2023 as a Family Medicine Physician in MERCED, California, prescribing 86% generic.

5K
Part D claims, 2023
86%
generic prescribing
Likely
board-certified (heuristic)

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.

JOASH KEMEI's Medicare Part D volume vs every U.S. prescriber

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

5,230 Top 6% higher than 94% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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 certification likely (heuristic — not verified)

JOASH KEMEI practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about JOASH KEMEI?

Quality data not reported

NPI registry status

Active

Issued 05/02/2018

NPI 1689163990

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

5,230 53% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in California

How Family Medicine Physician compares to other specialties among California providers

California providers

Family Medicine Physician share within California

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

Specialty board-certification context

Estimated specialty board-certified rate — Family Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Family Medicine Physician) — ABMS / AOA estimate

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

JOASH KEMEI appears in the CMS NPPES registry as a Family Medicine Physician provider at 2354 PACHECO DR, MERCED, CA, 95340, with a listed phone of (209) 233-7944. NPI 1689163990 was issued on 05/02/2018. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KEMEI 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 5,230 prescription claims written by this provider, covering 331 Medicare beneficiaries and totaling roughly $460K in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 5.2%. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

2354 PACHECO DR
MERCED, CA 95340

Provider Details

NPI 1689163990
Specialty Family Medicine Physician
Gender Male
NPI Issued 05/02/2018

Hospital and facility affiliations

Facilities where JOASH KEMEI bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

COMMUNITY HEALTH CENTERS OF AMERICA
LIVINGSTON, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 JOASH KEMEI. Source: openpaymentsdata.cms.gov.

Total received

$122

Largest payer

GlaxoSmithKline, LLC.

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 JOASH KEMEI. To verify JOASH KEMEI'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

JOASH KEMEI — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 5,230 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.

5,230
Total Claims
$460K
Total Drug Cost
331
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,540
Total Day Supply
174,985
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$346K
Generic Drug Cost
$113K
Opioid Claims
273 (5.2% rate)
Antibiotic Claims
106

Patient Demographics

Average Patient Age
69.0 years
Avg HCC Risk Score
1.44
Gender Split
52% female / 48% male
Age Distribution
<65: 85, 65-74: 146, 75-84: 72, 85+: 28

Top Prescribed Drugs (Medicare Part D)

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

What JOASH KEMEI 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
Atorvastatin Calcium
259
Hydrochlorothiazide
255
Potassium Chloride
182
Lisinopril
174
Levothyroxine Sodium
128
Losartan Potassium
127
Amlodipine Besylate
124
Gabapentin
114
Omeprazole
106
Meloxicam
100

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

Family Medicine Physician Overview

How JOASH KEMEI fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

JOASH KEMEI's 5,230 claims are above the specialty average of 3,418.

Nearby Family Medicine Physician Providers in California

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JOASH KEMEI's specialty?
JOASH KEMEI specializes in Family Medicine Physician and practices in MERCED, California.
How much does JOASH KEMEI prescribe under Medicare Part D?
In 2023, JOASH KEMEI wrote 5,230 Medicare Part D claims totaling $460K in drug costs for 331 beneficiaries.
Where is JOASH KEMEI located?
JOASH KEMEI is located at 2354 PACHECO DR, MERCED, CA, 95340. Phone: (209) 233-7944.
What is JOASH KEMEI's NPI number?
JOASH KEMEI's National Provider Identifier (NPI) is 1689163990, issued on 05/02/2018.
Does JOASH KEMEI prescribe more brand-name or generic drugs?
JOASH KEMEI's prescribing is 14% brand-name and 86% generic drugs by claim count, with $346K in brand drug costs.
Does JOASH KEMEI prescribe opioids?
Yes, JOASH KEMEI had 273 opioid claims in 2023 with an opioid prescribing rate of 5.2%.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does JOASH KEMEI prescribe most often?
Based on 2023 Medicare Part D data, JOASH KEMEI's most frequently prescribed drugs include Atorvastatin Calcium, Hydrochlorothiazide, Potassium Chloride. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOASH KEMEI accept Medicare?
JOASH KEMEI appears in CMS Medicare data with 5,230 Part D claims and 331 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOASH KEMEI's credentials?
JOASH KEMEI's NPI is 1689163990. 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