Doctor profile · Federal record

Dr. Deepak Thiagarajan, MD

Geriatric Medicine (Internal Medicine) Physician (CMS: Hospitalist) · Internal Medicine Physician · Geriatric Medicine (Internal Medicine) Physician · Rancho Cucamonga, CA

  • NPI 1205052990
  • Accepts Medicare
  • 24 yrs in practice
  • Licensed in 2 states
  • Male
  • Solo practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
7974 Haven Ave Ste 210
Rancho Cucamonga, CA 917303052
(909) 881-5994
fax (909) 248-7769
Mailing address
5036 Rodeo RD
Alta Loma, CA 917372408

Credentials & registration

NPPES · NUCC
NPI registered
April 2007 — 19 yrs on file
Profile last updated
April 4, 2024
Year of graduation
2002 — 24 yrs since
Specialty taxonomy
207RG0300X — NUCC code
State licenses (3)
California #A 113059 · Rhode Island #MD12318 · Rhode Island #LP00988
Medicaid
RI #DT68425

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1205052990. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
3,186
Distinct HCPCS
10
Medicare allowed
$426,159
HCPCS Description Services Patients Avg allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 1,516 99 $121
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 592 64 $109
99291 Critical care, first 30-74 minutes 436 74 $216
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 226 52 $157
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes 115 38 $76
99497 Advance care planning, first 30 minutes 100 67 $77
99215 Established patient office or other outpatient visit, 40-54 minutes 69 13 $185
99306 Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 49 43 $186
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 35 12 $81
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 25 23 $176

In context: peer comparison

Among 1 peers in this city , average services per provider: 289. This provider delivers 11× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
1,595
Patients
350
Total drug cost
$67,330
Drug Type Claims Patients Total cost
Atorvastatin Calcium Generic 258 55 $2,792
Amlodipine Besylate Generic 183 32 $1,316
Eliquis (Apixaban) Brand 130 19 $42,579
Gabapentin Generic 111 23 $1,983
Furosemide Generic 101 28 $692
Carvedilol Generic 99 25 $882
Pantoprazole Sodium Generic 98 24 $6,981
Sodium Chloride (0.9 % Sodium Chloride) Brand 92 21 $2,778
Lisinopril Generic 87 17 $605
Levothyroxine Sodium Generic 86 20 $1,029

Frequently asked questions

Auto-generated from federal data
What is Dr. Deepak Thiagarajan's medical specialty?
Dr. Deepak Thiagarajan practices Geriatric Medicine (Internal Medicine) Physician in Rancho Cucamonga, CA.
Where does Dr. Deepak Thiagarajan practice?
Dr. Deepak Thiagarajan practices at 7974 Haven Ave Ste 210, Rancho Cucamonga, CA 917303052. Office phone: 9098815994.
What is Dr. Deepak Thiagarajan's NPI?
Dr. Deepak Thiagarajan's National Provider Identifier (NPI) is 1205052990, issued by NPPES.
Does Dr. Deepak Thiagarajan accept Medicare assignment?
Yes. Dr. Deepak Thiagarajan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Deepak Thiagarajan commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent nursing facility care with moderate level of medical decision making (HCPCS 99309); Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.