Charles Garretson, MD
NPI 1144284373 · Internal Medicine Physician · Live Oak, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Garretson, MD is a Internal Medicine Physician provider in Live Oak, CA (NPI 1144284373).
Provider details
- NPI number
- 1144284373
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G86610 (CA)
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
20 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
9,995 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 Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 5,132 | $72 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 2,216 | $132 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 2,073 | $100 |
| Nursing Facility Discharge Day Management, 30 Minutes Or Less99315 | 532 | $75 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 42 | $75 |
Typical Medicare-allowed amounts for these services range $72–$132 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 299 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,676 | 353 |
| Apixabanbrand: Eliquis | 1,531 | 184 |
| Levothyroxine Sodium | 1,498 | 237 |
| Furosemide | 1,266 | 260 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 1,142 | 174 |
| Gabapentin | 1,078 | 222 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-14
- Last updated
- 2025-12-10
- Certified
- 2025-12-10
Frequently asked questions
- What is Charles Garretson's NPI number?
- Charles Garretson's National Provider Identifier (NPI) is 1144284373, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Garretson's specialty?
- Charles Garretson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Garretson located?
- Charles Garretson's practice location on file with NPPES is 9792 Live Oak Blvd Ste E, Live Oak, CA 95953-2381.
- What is Charles Garretson's phone number?
- The practice phone number listed in the NPPES registry for Charles Garretson is (304) 610-7267.
- Does Charles Garretson accept Medicare?
- Charles Garretson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Garretson's NPI active?
- Yes — Charles Garretson's NPI (1144284373) is active in the NPPES registry as of the last update on 2025-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.