2026 NPPES data Anatomic Pathology & Clinical Pathology Physician NPI 1669442315 M.D.
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STEPHEN BAUER, M.D.

Anatomic Pathology & Clinical Pathology Physician in CARMICHAEL, 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
20
Medicare Part D claims · Anatomic Pathology & Clinical Pathology Physician avg: 284
Industry payments
$18.4
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: STEPHEN BAUER, M.D. is a Anatomic Pathology & Clinical Pathology Physician ([object Object]) practicing in CARMICHAEL, California with a Medicare Part D prescribing footprint of 20 claims . Industry payments of $18.4 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: STEPHEN BAUER, M.D. filed 20 Medicare Part D claims in 2023 across CARMICHAEL, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

STEPHEN BAUER, 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).

STEPHEN BAUER, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 01/25/2006

NPI 1669442315

Primary specialty

Anatomic Pathology & Clinical Pathology Physician

Mid-sized

13,692 US NPIs in this specialty

Medicare Part D claims

20 93% vs specialty avg

2023 prescription claims

Specialty avg: 284

Specialty distribution in California

How Anatomic Pathology & Clinical Pathology Physician compares to other specialties among California providers

California providers

Anatomic Pathology & Clinical Pathology Physician share within California

1. Anatomic Pathology & Clinical Pathology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Anatomic Pathology & Clinical Pathology Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Anatomic Pathology & Clinical Pathology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Anatomic Pathology & Clinical Pathology Physician ABMS/AOA estimate

Est. board-certified rate (Anatomic Pathology & Clinical Pathology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Anatomic Pathology & Clinical Pathology 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).

STEPHEN BAUER, M.D. is a Anatomic Pathology & Clinical Pathology Physician provider practicing in CARMICHAEL, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1669442315. 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.

STEPHEN BAUER, M.D. appears in the CMS NPPES registry as a Anatomic Pathology & Clinical Pathology Physician provider holding M.D. credentials at 6501 COYLE AVE, CARMICHAEL, CA, 95608, with a listed phone of (916) 537-5275. NPI 1669442315 was issued on 01/25/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BAUER 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 20 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $549 in drug spend. 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.

Anatomic Pathology & Clinical Pathology Physician is a mid-sized specialty nationwide, with 13,692 enrolled providers across 55 states and an average of 284 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

6501 COYLE AVE
CARMICHAEL, CA 95608

Provider Details

NPI 1669442315
Specialty Anatomic Pathology & Clinical Pathology Physician
Credentials M.D.
Gender Male
NPI Issued 01/25/2006

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 STEPHEN BAUER, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$18

Largest payer

Abbott Laboratories

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 STEPHEN BAUER, M.D.. To verify STEPHEN BAUER, 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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

20
Total Claims
$549
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
44
Total Day Supply
1,195
Generic Drug Cost
$472

Patient Demographics

Average Patient Age
74.0 years
Avg HCC Risk Score
0.33

Anatomic Pathology & Clinical Pathology Physician Overview

How STEPHEN BAUER, M.D. fits within the Anatomic Pathology & Clinical Pathology Physician landscape nationally.

13,692
Anatomic Pathology & Clinical Pathology Physician Providers in US
55
States with Anatomic Pathology & Clinical Pathology Physician
284
Avg Claims per Provider

STEPHEN BAUER, M.D.'s 20 claims are below the specialty average of 284.

Nearby Anatomic Pathology & Clinical Pathology Physician Providers in California

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

Compare Anatomic Pathology & Clinical Pathology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is STEPHEN BAUER, M.D.'s specialty?
STEPHEN BAUER, M.D. specializes in Anatomic Pathology & Clinical Pathology Physician and practices in CARMICHAEL, California. Credentials: M.D..
How much does STEPHEN BAUER, M.D. prescribe under Medicare Part D?
In 2023, STEPHEN BAUER, M.D. wrote 20 Medicare Part D claims totaling $549 in drug costs for N/A beneficiaries.
Where is STEPHEN BAUER, M.D. located?
STEPHEN BAUER, M.D. is located at 6501 COYLE AVE, CARMICHAEL, CA, 95608. Phone: (916) 537-5275.
What is STEPHEN BAUER, M.D.'s NPI number?
STEPHEN BAUER, M.D.'s National Provider Identifier (NPI) is 1669442315, issued on 01/25/2006.
How many Anatomic Pathology & Clinical Pathology Physician providers are there in the US?
There are 13,692 Anatomic Pathology & Clinical Pathology Physician providers across 55 states in the US. The average Anatomic Pathology & Clinical Pathology Physician provider writes 284 Medicare Part D claims per year.
Does STEPHEN BAUER, M.D. accept Medicare?
STEPHEN BAUER, M.D. appears in CMS Medicare data with 20 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 STEPHEN BAUER, M.D.'s credentials?
STEPHEN BAUER, M.D.'s NPI is 1669442315 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