2026 NPPES data Cardiovascular Disease Physician NPI 1598795429 MD
Verify on CMS →

JOHN AMBROSE, MD

Cardiovascular Disease Physician in FRESNO, 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
1K
Medicare Part D claims · 230 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$78.18
4 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: JOHN AMBROSE, MD is a Cardiovascular Disease Physician ([object Object]) practicing in FRESNO, California with a Medicare Part D prescribing footprint of 1K claims across 230 beneficiaries — 11% brand-name prescribing . Industry payments of $78.18 across 4 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: JOHN AMBROSE, MD filed 1,319 Medicare Part D claims in 2023 across FRESNO, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

JOHN AMBROSE, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

JOHN AMBROSE, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 07/04/2006

NPI 1598795429

Primary specialty

Cardiovascular Disease Physician

Mid-sized

24,795 US NPIs in this specialty

Medicare Part D claims

1,319 57% vs specialty avg

2023 prescription claims

Specialty avg: 3,033

Specialty distribution in California

How Cardiovascular Disease Physician compares to other specialties among California providers

California providers

Cardiovascular Disease Physician share within California

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

Specialty board-certification context

Estimated specialty board-certified rate — Cardiovascular Disease Physician (ABMS / AOA reference)

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

Est. board-certified rate (Cardiovascular Disease Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Cardiovascular Disease 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 AMBROSE, MD is a Cardiovascular Disease Physician provider practicing in FRESNO, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1598795429. 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.

JOHN AMBROSE, MD appears in the CMS NPPES registry as a Cardiovascular Disease Physician provider holding MD credentials at 2335 E KASHIAN LN STE 240, FRESNO, CA, 93701, with a listed phone of (559) 320-0545. NPI 1598795429 was issued on 07/04/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AMBROSE 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 1,319 prescription claims written by this provider, covering 230 Medicare beneficiaries and totaling roughly $168K 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.

Cardiovascular Disease Physician is a mid-sized specialty nationwide, with 24,795 enrolled providers across 54 states and an average of 3,033 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

2335 E KASHIAN LN STE 240
FRESNO, CA 93701

Provider Details

NPI 1598795429
Specialty Cardiovascular Disease Physician
Credentials MD
Gender Male
NPI Issued 07/04/2006

Hospital and facility affiliations

Facilities where JOHN AMBROSE, MD 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.

CENTRAL CALIFORNIA FACULTY MEDICAL GROUP INC
FRESNO, CA
FRESNO COMMUNITY HOSPITAL AND MEDICAL CENTER
FRESNO, CA
UNIVERSITY FACULTY ASSOCIATES INC
FRESNO, 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 JOHN AMBROSE, MD. Source: openpaymentsdata.cms.gov.

Total received

$78

Largest payer

Amgen 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 JOHN AMBROSE, MD. To verify JOHN AMBROSE, 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

JOHN AMBROSE, MD — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 1,319 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.

1,319
Total Claims
$168K
Total Drug Cost
230
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,197
Total Day Supply
95,632
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$133K
Generic Drug Cost
$34K

Patient Demographics

Average Patient Age
73.6 years
Avg HCC Risk Score
1.51
Gender Split
37% female / 63% male
Age Distribution
<65: 19, 65-74: 99, 75-84: 88, 85+: 24

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
195
Rosuvastatin Calcium
110
Metoprolol Succinate
108
Losartan Potassium
73
Lisinopril
72
Spironolactone
69
Eliquis
Apixaban
62
Carvedilol
60
Hydrochlorothiazide
60
Ezetimibe
57

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

Cardiovascular Disease Physician Overview

How JOHN AMBROSE, MD fits within the Cardiovascular Disease Physician landscape nationally.

24,795
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
3,033
Avg Claims per Provider

JOHN AMBROSE, MD's 1,319 claims are below the specialty average of 3,033.

Nearby Cardiovascular Disease Physician Providers in California

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

Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JOHN AMBROSE, MD's specialty?
JOHN AMBROSE, MD specializes in Cardiovascular Disease Physician and practices in FRESNO, California. Credentials: MD.
How much does JOHN AMBROSE, MD prescribe under Medicare Part D?
In 2023, JOHN AMBROSE, MD wrote 1,319 Medicare Part D claims totaling $168K in drug costs for 230 beneficiaries.
Where is JOHN AMBROSE, MD located?
JOHN AMBROSE, MD is located at 2335 E KASHIAN LN STE 240, FRESNO, CA, 93701. Phone: (559) 320-0545.
What is JOHN AMBROSE, MD's NPI number?
JOHN AMBROSE, MD's National Provider Identifier (NPI) is 1598795429, issued on 07/04/2006.
Does JOHN AMBROSE, MD prescribe more brand-name or generic drugs?
JOHN AMBROSE, MD's prescribing is 11% brand-name and 89% generic drugs by claim count, with $133K in brand drug costs.
How many Cardiovascular Disease Physician providers are there in the US?
There are 24,795 Cardiovascular Disease Physician providers across 54 states in the US. The average Cardiovascular Disease Physician provider writes 3,033 Medicare Part D claims per year.
What drugs does JOHN AMBROSE, MD prescribe most often?
Based on 2023 Medicare Part D data, JOHN AMBROSE, MD's most frequently prescribed drugs include Atorvastatin Calcium, Rosuvastatin Calcium, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOHN AMBROSE, MD accept Medicare?
JOHN AMBROSE, MD appears in CMS Medicare data with 1,319 Part D claims and 230 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOHN AMBROSE, MD's credentials?
JOHN AMBROSE, MD's NPI is 1598795429 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