NPI registry status
Active
2026 NPPES data Sleep Medicine (Psychiatry & Neurology) Physician NPI 1144231077 M.D.
Verify on CMS → Mark Garwood, M.D.
Sleep Medicine (Psychiatry & Neurology) Physician in Ann Arbor, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 376 in Sleep Medicine (Psychiatry & Neurology) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
206
Medicare Part D claims · 34 beneficiaries · Sleep Medicine (Psychiatry & Neurology) Physician avg: 1K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mark Garwood, M.D. filed 206 Medicare Part D claims in 2023 as a Sleep Medicine (Psychiatry & Neurology) Physician in Ann Arbor, Michigan, prescribing 95% generic.
- 206
- Part D claims, 2023
- 95%
- 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.
Mark Garwood, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
206 49th percentile higher than 49% of 1,370,886 prescribers
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)
Mark Garwood, M.D. 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 Mark Garwood, M.D.?
Quality data not reportedPrimary specialty
Sleep Medicine (Psychiatry & Neurology) Physician
Medicare Part D claims
206 80% vs specialty avg
Specialty distribution in Michigan
How Sleep Medicine (Psychiatry & Neurology) Physician compares to other specialties among Michigan providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Sleep Medicine (Psychiatry & Neurology) Physician. Verify directly:
How MIPS and board certification work
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).
Mark Garwood, M.D. appears in the CMS NPPES registry as a Sleep Medicine (Psychiatry & Neurology) Physician provider holding M.D. credentials at 1500 E MEDICAL CENTER DR, Ann Arbor, MI, 48109, with a listed phone of (734) 936-4000. NPI 1144231077 was issued on 08/09/2006.
Medicare Part D records for calendar year 2023 show 206 prescription claims written by this provider, covering 34 Medicare beneficiaries and totaling roughly $25K in drug spend, split 5% brand-name and 95% generic by claim count, with an opioid prescribing rate of 11.2%.
Sleep Medicine (Psychiatry & Neurology) Physician is a narrow specialty nationwide, with 376 enrolled providers across 46 states and an average of 1,005 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
Provider Details
| NPI | 1144231077 |
|---|---|
| Specialty | Sleep Medicine (Psychiatry & Neurology) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/09/2006 |
Hospital and facility affiliations
Facilities where Mark Garwood, M.D. 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.
Regents OF The University OF Michigan
Ann Arbor, MI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Mark Garwood, M.D.. To verify Mark Garwood, M.D.'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.
Brand vs generic prescribing mix · Generic-heavy
Mark Garwood, M.D. - brand share 5.0%
Sleep Medicine (Psychiatry & Neurology) Physician average
5% brand-name claims vs 95% generic, on 206 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.
206
Total Claims
$25K
Total Drug Cost
34
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 414
- Total Day Supply
- 12,379
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $14K
- Generic Drug Cost
- $11K
- Opioid Claims
- 23 (11.2% rate)
Patient Demographics
- Average Patient Age
- 71.1 years
- Avg HCC Risk Score
- 1.78
- Gender Split
- 59% female / 41% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Garwood, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
28 claims
- Methylphenidate Hcl
Methylphenidate Hcl
25 claims
- Armodafinil
Armodafinil
20 claims
- Trazodone Hcl
Trazodone Hcl
19 claims
- Zolpidem Tartrate
Zolpidem Tartrate
14 claims
- Methadone Hcl
Methadone Hcl
13 claims
| Drug | Claims |
|---|---|
| Gabapentin | 28 |
| Methylphenidate Hcl | 25 |
| Armodafinil | 20 |
| Trazodone Hcl | 19 |
| Zolpidem Tartrate | 14 |
| Methadone Hcl | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Sleep Medicine (Psychiatry & Neurology) Physician in MI →
All providers in Michigan →
Compare specialties →
Sleep Medicine (Psychiatry & Neurology) Physician Overview
How Mark Garwood, M.D. fits within the Sleep Medicine (Psychiatry & Neurology) Physician landscape nationally.
376
Sleep Medicine (Psychiatry & Neurology) Physician Providers in US
46
States with Sleep Medicine (Psychiatry & Neurology) Physician
1,005
Avg Claims per Provider
Mark Garwood, M.D.'s 206 claims are below the specialty average of 1,005.
Nearby Sleep Medicine (Psychiatry & Neurology) Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Garwood.
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Sleep Medicine (Psychiatry & Neurology) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Medical Specialties Explained
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Mark Garwood, M.D.'s specialty? ▼
Mark Garwood, M.D. specializes in Sleep Medicine (Psychiatry & Neurology) Physician and practices in Ann Arbor, Michigan. Credentials: M.D..
How much does Mark Garwood, M.D. prescribe under Medicare Part D? ▼
In 2023, Mark Garwood, M.D. wrote 206 Medicare Part D claims totaling $25K in drug costs for 34 beneficiaries.
Where is Mark Garwood, M.D. located? ▼
Mark Garwood, M.D. is located at 1500 E MEDICAL CENTER DR, Ann Arbor, MI, 48109. Phone: (734) 936-4000.
What is Mark Garwood, M.D.'s NPI number? ▼
Mark Garwood, M.D.'s National Provider Identifier (NPI) is 1144231077, issued on 08/09/2006.
Does Mark Garwood, M.D. prescribe more brand-name or generic drugs? ▼
Mark Garwood, M.D.'s prescribing is 5% brand-name and 95% generic drugs by claim count, with $14K in brand drug costs.
Does Mark Garwood, M.D. prescribe opioids? ▼
Yes, Mark Garwood, M.D. had 23 opioid claims in 2023 with an opioid prescribing rate of 11.2%.
How many Sleep Medicine (Psychiatry & Neurology) Physician providers are there in the US? ▼
There are 376 Sleep Medicine (Psychiatry & Neurology) Physician providers across 46 states in the US. The average Sleep Medicine (Psychiatry & Neurology) Physician provider writes 1,005 Medicare Part D claims per year.
What drugs does Mark Garwood, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Garwood, M.D.'s most frequently prescribed drugs include Gabapentin, Methylphenidate Hcl, Armodafinil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Garwood, M.D. accept Medicare? ▼
Mark Garwood, M.D. appears in CMS Medicare data with 206 Part D claims and 34 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Garwood, M.D.'s credentials? ▼
Mark Garwood, M.D.'s NPI is 1144231077 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.