Tammy Lin, MD
NPI 1437683331 · Critical Care Medicine (Internal Medicine) Physician · Gainesville, GA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Lin, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Gainesville, GA (NPI 1437683331).
Provider details
- NPI number
- 1437683331
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 89406 (GA)
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
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
115 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 | 78 | $200 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 26 | $169 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 11 | $8 |
Typical Medicare-allowed amounts for these services range $8–$200 (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
Additional practice locations (1)
- 49 Jesse Hill Jr Dr SeAtlanta, GA 30303-3049Phone: (203) 917-7703
Registry dates
- Enumerated
- 2017-04-18
- Last updated
- 2022-08-18
- Certified
- 2022-08-18
Frequently asked questions
- What is Tammy Lin's NPI number?
- Tammy Lin's National Provider Identifier (NPI) is 1437683331, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Lin's specialty?
- Tammy Lin is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Tammy Lin located?
- Tammy Lin's practice location on file with NPPES is 743 Spring St Ne, Gainesville, GA 30501-3715.
- What is Tammy Lin's phone number?
- The practice phone number listed in the NPPES registry for Tammy Lin is (770) 219-9000.
- Does Tammy Lin accept Medicare?
- Tammy Lin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Lin's NPI active?
- Yes — Tammy Lin's NPI (1437683331) is active in the NPPES registry as of the last update on 2022-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.