Robert Landman, M.D.
NPI 1326035874 · Internal Medicine Physician · Yorba Linda, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Landman, M.D. is a Internal Medicine Physician provider in Yorba Linda, CA (NPI 1326035874).
Provider details
- NPI number
- 1326035874
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G305501 (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
466 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 | 350 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 47 | $99 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 37 | $140 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 32 | $9 |
Typical Medicare-allowed amounts for these services range $9–$140 (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 · 86 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 382 | 105 |
| Levothyroxine Sodium | 224 | 64 |
| Amlodipine Besylate | 221 | 59 |
| Losartan Potassium | 177 | 49 |
| Lisinopril | 173 | 53 |
| Omeprazole | 163 | 45 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-30
- Last updated
- 2013-04-25
Frequently asked questions
- What is Robert Landman's NPI number?
- Robert Landman's National Provider Identifier (NPI) is 1326035874, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Landman's specialty?
- Robert Landman is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Landman located?
- Robert Landman's practice location on file with NPPES is 4300 Rose Dr, Yorba Linda, CA 92886-2026.
- What is Robert Landman's phone number?
- The practice phone number listed in the NPPES registry for Robert Landman is (714) 528-4211.
- Does Robert Landman accept Medicare?
- Robert Landman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Landman's NPI active?
- Yes — Robert Landman's NPI (1326035874) is active in the NPPES registry as of the last update on 2013-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.