2026 NPPES data Emergency Medicine Physician NPI 1609046754 D.O.
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STEPHEN HEIRENDT, D.O.

Emergency Medicine Physician in ANN ARBOR, Michigan. 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
122
Medicare Part D claims · 100 beneficiaries · Emergency Medicine Physician avg: 352
Industry payments
$17
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

STEPHEN HEIRENDT, D.O. filed 122 Medicare Part D claims in 2023 as a Emergency Medicine Physician in ANN ARBOR, Michigan.

122
Part D claims, 2023
$17
industry payments (Sunshine Act)

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.

STEPHEN HEIRENDT, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

122 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

Board-eligible specialty (heuristic — not verified)

STEPHEN HEIRENDT, D.O. 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 STEPHEN HEIRENDT, D.O.?

Quality data not reported

NPI registry status

Active

Issued 03/05/2008

NPI 1609046754

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

122 65% vs specialty avg

2023 prescription claims

Specialty avg: 352

Specialty distribution in Michigan

How Emergency Medicine Physician compares to other specialties among Michigan providers

Michigan providers

Emergency Medicine Physician share within Michigan

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

Specialty board-certification context

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

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

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

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

STEPHEN HEIRENDT, D.O. appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding D.O. credentials at 2000 GREEN ROAD - EPMG, ANN ARBOR, MI, 48105, with a listed phone of (734) 995-3764. NPI 1609046754 was issued on 03/05/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HEIRENDT 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 122 prescription claims written by this provider, covering 100 Medicare beneficiaries and totaling roughly $1K in drug spend, with an opioid prescribing rate of 16.4%. 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.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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

2000 GREEN ROAD - EPMG
ANN ARBOR, MI 48105

Provider Details

NPI 1609046754
Specialty Emergency Medicine Physician
Credentials D.O.
Gender Male
NPI Issued 03/05/2008

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 HEIRENDT, D.O.. Source: openpaymentsdata.cms.gov.

Total received

$17

Largest payer

AstraZeneca Pharmaceuticals LP

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 — Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 — they are NOT specific to STEPHEN HEIRENDT, D.O.. To verify STEPHEN HEIRENDT, D.O.'s current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases

MI-BOM 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 Michigan 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.

122
Total Claims
$1K
Total Drug Cost
100
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
122
Total Day Supply
933
Generic Drug Cost
$1K
Opioid Claims
20 (16.4% rate)
Antibiotic Claims
50

Patient Demographics

Average Patient Age
68.9 years
Avg HCC Risk Score
1.50
Gender Split
54% female / 46% male

Top Prescribed Drugs (Medicare Part D)

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

What STEPHEN HEIRENDT, D.O. 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
Prednisone
18
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
16
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
14
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
13

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

Emergency Medicine Physician Overview

How STEPHEN HEIRENDT, D.O. fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

STEPHEN HEIRENDT, D.O.'s 122 claims are below the specialty average of 352.

Nearby Emergency Medicine Physician Providers in Michigan

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

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

Frequently Asked Questions

What is STEPHEN HEIRENDT, D.O.'s specialty?
STEPHEN HEIRENDT, D.O. specializes in Emergency Medicine Physician and practices in ANN ARBOR, Michigan. Credentials: D.O..
How much does STEPHEN HEIRENDT, D.O. prescribe under Medicare Part D?
In 2023, STEPHEN HEIRENDT, D.O. wrote 122 Medicare Part D claims totaling $1K in drug costs for 100 beneficiaries.
Where is STEPHEN HEIRENDT, D.O. located?
STEPHEN HEIRENDT, D.O. is located at 2000 GREEN ROAD - EPMG, ANN ARBOR, MI, 48105. Phone: (734) 995-3764.
What is STEPHEN HEIRENDT, D.O.'s NPI number?
STEPHEN HEIRENDT, D.O.'s National Provider Identifier (NPI) is 1609046754, issued on 03/05/2008.
Does STEPHEN HEIRENDT, D.O. prescribe opioids?
Yes, STEPHEN HEIRENDT, D.O. had 20 opioid claims in 2023 with an opioid prescribing rate of 16.4%.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does STEPHEN HEIRENDT, D.O. prescribe most often?
Based on 2023 Medicare Part D data, STEPHEN HEIRENDT, D.O.'s most frequently prescribed drugs include Prednisone, Oxycodone-Acetaminophen, Amoxicillin-Clavulanate Potass. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does STEPHEN HEIRENDT, D.O. accept Medicare?
STEPHEN HEIRENDT, D.O. appears in CMS Medicare data with 122 Part D claims and 100 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify STEPHEN HEIRENDT, D.O.'s credentials?
STEPHEN HEIRENDT, D.O.'s NPI is 1609046754 with credentials D.O.. 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