Cody Chastain, M.D.
NPI 1326214438 · Infectious Disease Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1326214438
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 49687 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
100 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 45 | $122 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 30 | $74 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 13 | $72 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 12 | $126 |
Typical Medicare-allowed amounts for these services range $72–$126 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 148 | 21 |
| Emtricitabine/Tenofov Alafenambrand: Descovy | 95 | 11 |
| Dolutegravir Sodiumbrand: Tivicay | 88 | 11 |
| Entecavir | 85 | — |
| Gabapentin | 64 | 11 |
| Rosuvastatin Calcium | 60 | 14 |
| Darunavir/Cobicistatbrand: Prezcobix |
Practice location
Mailing address
Additional practice locations (2)
- 1211 21st Ave SNashville, TN 37212-2717Phone: (615) 936-2000
- 719 Thompson LnNashville, TN 37204-3609Phone: (615) 322-3000
Registry dates
- Enumerated
- 2008-05-08
- Last updated
- 2022-03-24
- Certified
- 2022-03-24
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.