Deepak Thiagarajan, MD
NPI 1205052990 · Geriatric Medicine (Internal Medicine) Physician · Rancho Cucamonga, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Deepak Thiagarajan, MD is a Geriatric Medicine (Internal Medicine) Physician provider in Rancho Cucamonga, CA (NPI 1205052990).
Provider details
- NPI number
- 1205052990
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD12318 (RI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
2,147 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 Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 1,026 | $118 |
| Critical Care, First 30-74 Minutes99291 | 343 | $211 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 332 | $109 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 140 | $75 |
| Advance Care Planning, First 30 Minutes99497 | 92 | $75 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 77 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 85 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 235 | 45 |
| Gabapentin | 134 | 25 |
| Amlodipine Besylate | 123 | 31 |
| Levetiracetam | 108 | 17 |
| Apixabanbrand: Eliquis | 106 | 16 |
| Pantoprazole Sodium | 99 | 22 |
| Metoprolol Tartrate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-18
- Last updated
- 2024-04-04
- Certified
- 2024-04-04
Frequently asked questions
- What is Deepak Thiagarajan's NPI number?
- Deepak Thiagarajan's National Provider Identifier (NPI) is 1205052990, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Deepak Thiagarajan's specialty?
- Deepak Thiagarajan is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Deepak Thiagarajan located?
- Deepak Thiagarajan's practice location on file with NPPES is 7974 Haven Ave Ste 210, Rancho Cucamonga, CA 91730-3052.
- What is Deepak Thiagarajan's phone number?
- The practice phone number listed in the NPPES registry for Deepak Thiagarajan is (909) 881-5994.
- Does Deepak Thiagarajan accept Medicare?
- Deepak Thiagarajan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Deepak Thiagarajan's NPI active?
- Yes — Deepak Thiagarajan's NPI (1205052990) is active in the NPPES registry as of the last update on 2024-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.