NPI registry status
Active
2026 NPPES data Infectious Disease Physician NPI 1295815512 MD
Verify on CMS → John Narro, MD
Infectious Disease Physician in Knoxville, 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 8,292 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 · 190 beneficiaries · Infectious Disease Physician avg: 816
Generic prescribing
26%
generic claims · 74% 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
John Narro, MD filed 3,003 Medicare Part D claims in 2023 as a Infectious Disease Physician in Knoxville, Tennessee, prescribing 26% generic.
- 3K
- Part D claims, 2023
- 26%
- generic prescribing
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.
John Narro, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,003 Top 11% higher than 89% 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-eligible specialty (heuristic, not verified)
John Narro, MD 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 John Narro, MD?
Quality data not reportedPrimary specialty
Infectious Disease Physician
Medicare Part D claims
3,003 268% 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).
John Narro, MD appears in the CMS NPPES registry as a Infectious Disease Physician provider holding MD credentials at 1924 ALCOA HWY, Knoxville, TN, 37920, with a listed phone of (865) 305-9340. NPI 1295815512 was issued on 10/17/2006.
Medicare Part D records for calendar year 2023 show 3,003 prescription claims written by this provider, covering 190 Medicare beneficiaries and totaling roughly $8.0 million in drug spend, split 74% brand-name and 26% generic by claim count.
Infectious Disease Physician is a mid-sized specialty nationwide, with 8,292 enrolled providers across 54 states and an average of 816 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 | 1295815512 |
|---|---|
| Specialty | Infectious Disease Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/17/2006 |
Brand vs generic prescribing mix · Brand-heavy
John Narro, MD - brand share 74.0%
Infectious Disease Physician average
74% brand-name claims vs 26% generic, on 3,003 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.
3,003
Total Claims
$8.0M
Total Drug Cost
190
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,404
- Total Day Supply
- 101,165
- Brand vs Generic
- 74% brand / 26% generic
- Brand Drug Cost
- $7.9M
- Generic Drug Cost
- $95K
- Antibiotic Claims
- 22
Patient Demographics
- Average Patient Age
- 58.7 years
- Avg HCC Risk Score
- 1.78
- Gender Split
- 24% female / 76% male
- Age Distribution
- <65: 122, 65-74: 61, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Narro, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Biktarvy
Biktarvy
888 claims
- Tivicay 209
Tivicay
209 claims
- Pifeltro 190
Pifeltro
190 claims
- Symtuza 155
Symtuza
155 claims
- Prezcobix 147
Prezcobix
147 claims
- Atorvastatin Calcium 104
Atorvastatin Calcium
104 claims
- Genvoya 103
Genvoya
103 claims
- Triumeq 94
Triumeq
94 claims
| Drug | Claims |
|---|---|
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 888 |
| Tivicay Dolutegravir Sodium | 209 |
| Pifeltro Doravirine | 190 |
| Symtuza Darunavir/Cob/Emtri/Tenof Alaf | 155 |
| Prezcobix Darunavir/Cobicistat | 147 |
| Atorvastatin Calcium | 104 |
| Genvoya Elviteg/Cob/Emtri/Tenof Alafen | 103 |
| Triumeq Abacavir/Dolutegravir/Lamivudi | 94 |
| Odefsey Emtricitab/Rilpiviri/Tenof Ala | 91 |
| Descovy Emtricitabine/Tenofov Alafenam | 90 |
* 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 John Narro, MD fits within the Infectious Disease Physician landscape nationally.
8,292
Infectious Disease Physician Providers in US
54
States with Infectious Disease Physician
816
Avg Claims per Provider
John Narro, MD's 3,003 claims are above the specialty average of 816.
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 Narro.
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 →
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 Tennessee medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Infectious Disease 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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Frequently Asked Questions
What is John Narro, MD's specialty? ▼
John Narro, MD specializes in Infectious Disease Physician and practices in Knoxville, Tennessee. Credentials: MD.
How much does John Narro, MD prescribe under Medicare Part D? ▼
In 2023, John Narro, MD wrote 3,003 Medicare Part D claims totaling $8.0M in drug costs for 190 beneficiaries.
Where is John Narro, MD located? ▼
John Narro, MD is located at 1924 ALCOA HWY, Knoxville, TN, 37920. Phone: (865) 305-9340.
What is John Narro, MD's NPI number? ▼
John Narro, MD's National Provider Identifier (NPI) is 1295815512, issued on 10/17/2006.
Does John Narro, MD prescribe more brand-name or generic drugs? ▼
John Narro, MD's prescribing is 74% brand-name and 26% generic drugs by claim count, with $7.9M in brand drug costs.
How many Infectious Disease Physician providers are there in the US? ▼
There are 8,292 Infectious Disease Physician providers across 54 states in the US. The average Infectious Disease Physician provider writes 816 Medicare Part D claims per year.
What drugs does John Narro, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, John Narro, MD's most frequently prescribed drugs include Biktarvy, Tivicay, Pifeltro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Narro, MD accept Medicare? ▼
John Narro, MD appears in CMS Medicare data with 3,003 Part D claims and 190 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Narro, MD's credentials? ▼
John Narro, MD's NPI is 1295815512 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 (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.