NPI registry status
Active
2026 NPPES data Chiropractor NPI 1538398680 MD
Verify on CMS → Michael Ambrose, MD
Chiropractor in Mount Vernon, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 96,234 in Chiropractor, 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
158
Medicare Part D claims · 43 beneficiaries · Chiropractor avg: 906
What the federal data shows
Michael Ambrose, MD filed 158 Medicare Part D claims in 2024 as a Chiropractor in Mount Vernon, Illinois.
- 158
- Part D claims, 2024
- ≥34th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Michael Ambrose, MD
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1538398680), first enumerated 07/10/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 158 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Michael Ambrose, MD's individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1538398680 · Chiropractor
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1538398680
- ENUM-MID 2009
- TAX-MEGA 96K Chiropractor
- RX-LIGHT 158
- BOOK-LIGHT 4,517 in Illinois
- PHOTO-ENUM James Rizer · 2009
Michael Ambrose, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
158 ≥ 34th percentile 34% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
What does the federal data show about Michael Ambrose, MD?
Quality data not reportedPrimary specialty
Chiropractor
Medicare Part D claims
158 83% vs specialty avg
Specialty distribution in Illinois
How Chiropractor compares to other specialties among Illinois 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 Chiropractor. 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).
Practice Address
Provider Details
| NPI | 1538398680 |
|---|---|
| Specialty | Chiropractor |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/10/2009 |
License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to Michael Ambrose, MD. To verify Michael Ambrose, MD's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois 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 2024.
158
Total Claims
$9K
Total Drug Cost
43
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 307.033
- Total Day Supply
- 8,796
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 1.03
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Progesterone Progesterone, Micronized | 52 |
| Levothyroxine Sodium | 34 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Chiropractor Overview
How Michael Ambrose, MD fits within the Chiropractor landscape nationally.
96,234
Chiropractor Providers in US
56
States with Chiropractor
906
Avg Claims per Provider
Michael Ambrose, MD's 158 claims are below the specialty average of 906.
Nationwide Chiropractor peers with similar MIPS or enrollment year
Two federal-record peer sets for Ambrose, both outside Illinois so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Chiropractor Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Ambrose.
One of 4,517 Chiropractor providers enrolled in Illinois, 5 are shown here.
Dr. Jill Aardema
D.C.
Oak Park, IL
Dr. Robert Aarestad
DC, B.S., MMP
Plainfield, IL
Dr. Michael Abbett
DC
Granite City, IL
Dr. Wala Abu-Mallouh
DC
Romeoville, IL
Dr. Rashid Abu-Shanab
D.C.
Bridgeview, IL
Compare Chiropractor nationally: see state-by-state distribution →
Frequently Asked Questions
What is Michael Ambrose, MD's specialty? ▼
Michael Ambrose, MD specializes in Chiropractor and practices in Mount Vernon, Illinois. Credentials: MD.
How much does Michael Ambrose, MD prescribe under Medicare Part D? ▼
In 2024, Michael Ambrose, MD wrote 158 Medicare Part D claims totaling $9K in drug costs for 43 beneficiaries.
Where is Michael Ambrose, MD located? ▼
Michael Ambrose, MD is located at 605 N 12TH ST, Mount Vernon, IL, 62864. Phone: (618) 241-2212.
What is Michael Ambrose, MD's NPI number? ▼
Michael Ambrose, MD's National Provider Identifier (NPI) is 1538398680, issued on 07/10/2009.
How many Chiropractor providers are there in the US? ▼
There are 96,234 Chiropractor providers across 56 states in the US. The average Chiropractor provider writes 906 Medicare Part D claims per year.
What drugs does Michael Ambrose, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Michael Ambrose, MD's most frequently prescribed drugs include Progesterone, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Ambrose, MD accept Medicare? ▼
Michael Ambrose, MD appears in CMS Medicare data with 158 Part D claims and 43 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Ambrose, MD's credentials? ▼
Michael Ambrose, MD's NPI is 1538398680 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
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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.