Nathan Ashby, MD
NPI 1700933678 · Critical Care Medicine (Anesthesiology) Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Ashby, MD is a Critical Care Medicine (Anesthesiology) Physician provider in Nashville, TN (NPI 1700933678).
Provider details
- NPI number
- 1700933678
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Anesthesiology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 40695 (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
90 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 39 | $179 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 34 | $69 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 17 | $40 |
Typical Medicare-allowed amounts for these services range $40–$179 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-04
- Last updated
- 2022-11-16
- Certified
- 2022-11-16
Frequently asked questions
- What is Nathan Ashby's NPI number?
- Nathan Ashby's National Provider Identifier (NPI) is 1700933678, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Ashby's specialty?
- Nathan Ashby is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Anesthesiology) Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Ashby located?
- Nathan Ashby's practice location on file with NPPES is 1211 21st Ave S, Nashville, TN 37212-2717.
- What is Nathan Ashby's phone number?
- The practice phone number listed in the NPPES registry for Nathan Ashby is (615) 936-2454.
- Does Nathan Ashby accept Medicare?
- Nathan Ashby is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Ashby's NPI active?
- Yes — Nathan Ashby's NPI (1700933678) is active in the NPPES registry as of the last update on 2022-11-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.