Ryan Mcnamara, MD
NPI 1598878084 · Internal Medicine Physician · Chattanooga, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Mcnamara, MD is a Internal Medicine Physician provider in Chattanooga, TN (NPI 1598878084).
Provider details
- NPI number
- 1598878084
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD0000035210 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,051 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 380 | $110 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 186 | $72 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 184 | $106 |
| Advance Care Planning, First 30 Minutes99497 | 143 | $70 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 59 | $161 |
| Critical Care, First 30-74 Minutes99291 | 30 | $186 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Torsemide | 118 | 47 |
| Atorvastatin Calcium | 110 | 40 |
| Potassium Chloride | 99 | 34 |
| Amlodipine Besylate | 75 | 23 |
| Spironolactone | 63 | 24 |
| Carvedilol | 60 | 21 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 60 | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-17
- Last updated
- 2010-10-20
Frequently asked questions
- What is Ryan Mcnamara's NPI number?
- Ryan Mcnamara's National Provider Identifier (NPI) is 1598878084, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Mcnamara's specialty?
- Ryan Mcnamara is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Mcnamara located?
- Ryan Mcnamara's practice location on file with NPPES is 2525 Dasales Avenue, Chattanooga, TN 37404-1161.
- What is Ryan Mcnamara's phone number?
- The practice phone number listed in the NPPES registry for Ryan Mcnamara is (423) 495-2620.
- Does Ryan Mcnamara accept Medicare?
- Ryan Mcnamara is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Mcnamara's NPI active?
- Yes — Ryan Mcnamara's NPI (1598878084) is active in the NPPES registry as of the last update on 2010-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.