Matthew Garrison, M.D.
NPI 1881814648 · Internal Medicine Physician · Johnson City, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Garrison, M.D. is a Internal Medicine Physician provider in Johnson City, TN (NPI 1881814648).
Provider details
- NPI number
- 1881814648
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 47882 (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
771 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 | 481 | $109 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 120 | $105 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 111 | $73 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 45 | $159 |
| Advance Care Planning, First 30 Minutes99497 | 14 | $70 |
Typical Medicare-allowed amounts for these services range $70–$159 (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 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 31 | 15 |
| Metoprolol Succinate | 30 | 14 |
| Metoprolol Tartrate | 27 | 18 |
| Rosuvastatin Calcium | 25 | 15 |
| Cefdinir | 22 | 22 |
| Furosemide | 20 | 14 |
| Clopidogrel Bisulfatebrand: Clopidogrel |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-26
- Last updated
- 2025-02-18
- Certified
- 2025-02-18
Frequently asked questions
- What is Matthew Garrison's NPI number?
- Matthew Garrison's National Provider Identifier (NPI) is 1881814648, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Garrison's specialty?
- Matthew Garrison is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Garrison located?
- Matthew Garrison's practice location on file with NPPES is 301 Med Tech Pkwy Ste 240, Johnson City, TN 37604-2641.
- What is Matthew Garrison's phone number?
- The practice phone number listed in the NPPES registry for Matthew Garrison is (423) 794-5520.
- Does Matthew Garrison accept Medicare?
- Matthew Garrison is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Garrison's NPI active?
- Yes — Matthew Garrison's NPI (1881814648) is active in the NPPES registry as of the last update on 2025-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.