Carl Buckhorn, M.D.
NPI 1649264847 · Internal Medicine Physician · Yorba Linda, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carl Buckhorn, M.D. is a Internal Medicine Physician provider in Yorba Linda, CA (NPI 1649264847).
Provider details
- NPI number
- 1649264847
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G73630 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
173 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 123 | $139 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 50 | $68 |
Typical Medicare-allowed amounts for these services range $68–$139 (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 · 76 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 216 | 27 |
| Gabapentin | 121 | 26 |
| Alprazolam | 117 | 15 |
| Lisinopril | 109 | 27 |
| Amlodipine Besylate | 104 | 39 |
| Atorvastatin Calcium | 102 | 36 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$377 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-02
- Last updated
- 2009-07-14
Frequently asked questions
- What is Carl Buckhorn's NPI number?
- Carl Buckhorn's National Provider Identifier (NPI) is 1649264847, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carl Buckhorn's specialty?
- Carl Buckhorn is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Carl Buckhorn located?
- Carl Buckhorn's practice location on file with NPPES is 18300 Yorba Linda Blvd, Yorba Linda, CA 92886-4052.
- What is Carl Buckhorn's phone number?
- The practice phone number listed in the NPPES registry for Carl Buckhorn is (714) 577-6031.
- Does Carl Buckhorn accept Medicare?
- Carl Buckhorn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carl Buckhorn's NPI active?
- Yes — Carl Buckhorn's NPI (1649264847) is active in the NPPES registry as of the last update on 2009-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.