NPI registry status
Active
2026 NPPES data Infectious Disease Physician NPI 1770640187 M.D.
Verify on CMS → Mark Carr, M.D.
Infectious Disease Physician in Nashville, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 8,537 in Infectious Disease 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
3K
Medicare Part D claims · 270 beneficiaries · Infectious Disease Physician avg: 807
What the federal data shows
Mark Carr, M.D. filed 3,047 Medicare Part D claims in 2024 as an Infectious Disease Physician in Nashville, Tennessee.
- 3K
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥88th
- 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 Mark Carr, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1770640187), first enumerated 01/03/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 3,047 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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 1770640187 · Infectious Disease Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1770640187
- ENUM-MID 2007
- TAX-MID 9K Infectious Disease
- RX-MID 3,047
- BOOK-THIN 145 in Tennessee
- PHOTO-ENUM Inemesit Umoren, M.D. · 2007
Mark Carr, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
3,047 ≥ 88th percentile 88% 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
✓
Board certification likely (heuristic, not verified)
Mark Carr, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Carr, M.D.?
Quality data not reportedPrimary specialty
Infectious Disease Physician
Medicare Part D claims
3,047 278% vs specialty avg
Specialty distribution in Tennessee
How Infectious Disease Physician compares to other specialties among Tennessee 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 Infectious Disease 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).
Practice Address
Provider Details
| NPI | 1770640187 |
|---|---|
| Specialty | Infectious Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 01/03/2007 |
Hospital and facility affiliations
Facilities where Mark Carr, 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.
Saint Thomas Medical Partners
Nashville, TN
Tennessee ID Physicians PC
Nashville, TN
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
3,047
Total Claims
$3.0M
Total Drug Cost
270
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,948.4
- Total Day Supply
- 109,155
- Generic Drug Cost
- $261K
- Opioid Claims
- 52 (1.7% rate)
- Antibiotic Claims
- 1,101
Patient Demographics
- Average Patient Age
- 69.0 years
- Avg HCC Risk Score
- 2.04
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 64, 65-74: 134, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Carr, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Biktarvy
Biktarvy
273 claims
- Doxycycline Hyclate
Doxycycline Hyclate
213 claims
- Cefadroxil
Cefadroxil
130 claims
- Sulfamethoxazole-T… 94
Sulfamethoxazole-Trimethoprim
94 claims
- Ceftriaxone 91
Ceftriaxone
91 claims
- Descovy 89
Descovy
89 claims
- Juluca 88
Juluca
88 claims
- Cefdinir 79
Cefdinir
79 claims
| Drug | Claims |
|---|---|
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 273 |
| Doxycycline Hyclate | 213 |
| Cefadroxil | 130 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 94 |
| Ceftriaxone Ceftriaxone Sodium | 91 |
| Descovy Emtricitabine/Tenofov Alafenam | 89 |
| Juluca Dolutegravir/Rilpivirine | 88 |
| Cefdinir | 79 |
| Doxycycline Monohydrate | 73 |
| Odefsey Emtricitab/Rilpiviri/Tenof Ala | 63 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Infectious Disease Physician Overview
How Mark Carr, M.D. fits within the Infectious Disease Physician landscape nationally.
8,537
Infectious Disease Physician Providers in US
54
States with Infectious Disease Physician
807
Avg Claims per Provider
Mark Carr, M.D.'s 3,047 claims are above the specialty average of 807.
Nationwide Infectious Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Carr, both outside Tennessee so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Infectious Disease Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Carr.
One of 145 Infectious Disease Physician providers enrolled in Tennessee, 5 are shown here.
Dr. Tina Agbaosi
M.D
Memphis, TN
Dr. Aimalohi Ahonkhai
MD
Nashville, TN
Dr. Elmarie Alexander
MD
Memphis, TN
Dr. J. Allan
MD
Powell, TN
Dr. Ban Allos
MD
Nashville, TN
Compare Infectious Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Carr, M.D.'s specialty? ▼
Mark Carr, M.D. specializes in Infectious Disease Physician and practices in Nashville, Tennessee. Credentials: M.D..
How much does Mark Carr, M.D. prescribe under Medicare Part D? ▼
In 2024, Mark Carr, M.D. wrote 3,047 Medicare Part D claims totaling $3.0M in drug costs for 270 beneficiaries.
Where is Mark Carr, M.D. located? ▼
Mark Carr, M.D. is located at 316 22ND AVE N, Nashville, TN, 37203. Phone: (615) 284-5185.
What is Mark Carr, M.D.'s NPI number? ▼
Mark Carr, M.D.'s National Provider Identifier (NPI) is 1770640187, issued on 01/03/2007.
Does Mark Carr, M.D. prescribe opioids? ▼
Yes, Mark Carr, M.D. had 52 opioid claims in 2024 with an opioid prescribing rate of 1.7%.
How many Infectious Disease Physician providers are there in the US? ▼
There are 8,537 Infectious Disease Physician providers across 54 states in the US. The average Infectious Disease Physician provider writes 807 Medicare Part D claims per year.
What drugs does Mark Carr, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Carr, M.D.'s most frequently prescribed drugs include Biktarvy, Doxycycline Hyclate, Cefadroxil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Carr, M.D. accept Medicare? ▼
Mark Carr, M.D. appears in CMS Medicare data with 3,047 Part D claims and 270 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Carr, M.D.'s credentials? ▼
Mark Carr, M.D.'s NPI is 1770640187 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 (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.