Douglas Clark, M.D.
NPI 1780688572 · Internal Medicine Physician · Garden Grove, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Clark, M.D. is a Internal Medicine Physician provider in Garden Grove, CA (NPI 1780688572).
Provider details
- NPI number
- 1780688572
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G050862 (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
21 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
366 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 108 | $138 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 103 | $97 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 87 | $17 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 24 | $98 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 17 | $194 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 90 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 287 | 82 |
| Amlodipine Besylate | 178 | 56 |
| Levothyroxine Sodium | 164 | 43 |
| Lisinopril | 119 | 35 |
| Losartan Potassium | 117 | 32 |
| Irbesartan | 116 | 34 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-09
- Last updated
- 2007-12-27
Frequently asked questions
- What is Douglas Clark's NPI number?
- Douglas Clark's National Provider Identifier (NPI) is 1780688572, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Clark's specialty?
- Douglas Clark is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Clark located?
- Douglas Clark's practice location on file with NPPES is 12665 Garden Grove Blvd, Garden Grove, CA 92843-1901.
- What is Douglas Clark's phone number?
- The practice phone number listed in the NPPES registry for Douglas Clark is (714) 530-7373.
- Does Douglas Clark accept Medicare?
- Douglas Clark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Clark's NPI active?
- Yes — Douglas Clark's NPI (1780688572) is active in the NPPES registry as of the last update on 2007-12-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.