Jonathan Hemphill, MD
NPI 1952405326 · Cardiovascular Disease Physician · Carmichael, CA
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Hemphill, MD is a Cardiovascular Disease Physician provider in Carmichael, CA (NPI 1952405326).
Provider details
- NPI number
- 1952405326
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A44304 (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
19 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
3,988 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 1,060 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 987 | $100 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 393 | $140 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 237 | $223 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 198 | $62 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System, Remote Up to 90 Days |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 71 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 597 | 147 |
| Atorvastatin Calcium | 535 | 171 |
| Metoprolol Succinate | 373 | 111 |
| Amlodipine Besylate | 345 | 112 |
| Losartan Potassium | 309 | 94 |
| Metoprolol Tartrate | 243 | 75 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$63 across 3 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
- 2006-09-07
- Last updated
- 2026-03-04
- Certified
- 2026-03-04
Frequently asked questions
- What is Jonathan Hemphill's NPI number?
- Jonathan Hemphill's National Provider Identifier (NPI) is 1952405326, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Hemphill's specialty?
- Jonathan Hemphill is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Hemphill located?
- Jonathan Hemphill's practice location on file with NPPES is 6555 Coyle Ave Ste 280, Carmichael, CA 95608-0302.
- What is Jonathan Hemphill's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Hemphill is (916) 536-3560.
- Does Jonathan Hemphill accept Medicare?
- Jonathan Hemphill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Hemphill's NPI active?
- Yes — Jonathan Hemphill's NPI (1952405326) is active in the NPPES registry as of the last update on 2026-03-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.