Calvin Gruss
NPI 1871980912 · Anesthesiology Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Calvin Gruss is a Anesthesiology Physician provider in Nashville, TN (NPI 1871980912).
Provider details
- NPI number
- 1871980912
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
39 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) |
|---|---|---|
| Anesthesia for Lens Surgery00142 | 39 | $56 |
Typical Medicare-allowed amounts for these services range $56–$56 (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
- 2015-04-15
- Last updated
- 2022-03-31
- Certified
- 2022-03-31
Frequently asked questions
- What is Calvin Gruss's NPI number?
- Calvin Gruss's National Provider Identifier (NPI) is 1871980912, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calvin Gruss's specialty?
- Calvin Gruss is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Calvin Gruss located?
- Calvin Gruss's practice location on file with NPPES is 3601 the Vanderbilt Clinic, Nashville, TN 37232-0004.
- What is Calvin Gruss's phone number?
- The practice phone number listed in the NPPES registry for Calvin Gruss is (615) 322-3000.
- Does Calvin Gruss accept Medicare?
- Calvin Gruss is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Calvin Gruss's NPI active?
- Yes — Calvin Gruss's NPI (1871980912) is active in the NPPES registry as of the last update on 2022-03-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.