DEEPAK THIAGARAJAN MD
NPI 1205052990
Internal Medicine - Geriatric Medicine in Rancho Cucamonga, CA

Q: What is Deepak Thiagarajan's NPI number?

The NPI number for Deepak Thiagarajan is 1205052990. It was assigned to this individual provider in the NPPES registry on April 18, 2007.

Q: What is Deepak Thiagarajan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Active since April 18, 2007PECOS EnrolledAccepts Medicare Assignment

7974 HAVEN AVE STE 210, RANCHO CUCAMONGA, CA 91730(909) 881-5994(909) 248-7769 Get Directions Write a Review

NPPES record last updated: April 4, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 4, 2024, Mar 18, 2016 (2 updates tracked since 2016).

On this page

About Deepak Thiagarajan Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DEEPAK THIAGARAJAN MD (NPI 1205052990) is an individual geriatric medicine provider in Rancho Cucamonga, California, licensed in California (A 113059) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2002).

NPPES Registry Identity

NPI1205052990

Entity TypeIndividualMale

Primary Taxonomy207RG0300X

Provider Legal NameDEEPAK THIAGARAJANCredential: MD

Location Address7974 HAVEN AVE STE 210Rancho Cucamonga, CA 91730-3052

Mailing Address5036 Rodeo RdAlta Loma, CA 91737-2408 · (909) 881-5994 · Fax (909) 248-7769

Phone(909) 881-5994

Fax(909) 248-7769

Sole ProprietorYes

Medical School CMSOtherGraduated 2002

Enumeration DateApril 18, 2007

Last NPPES UpdateApril 4, 20242 updates tracked since enumeration

NPPES CertifiedApril 4, 2024

✔ NPI 1205052990 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RG0300X

Licenses✔ Licensed in CA · A 113059✔ Licensed in RI · LP00988

Definition

An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.

Also ListedInternal MedicineTaxonomy 207R00000X · License MD12318 (RI)

7974 HAVEN AVE STE 210, Rancho Cucamonga, CA 91730

Open in Google Maps ↗

Other Identifiers 4

Other414203RI · Bluechip

MedicaidDT68425RI

OtherAA91479RI · Hphc - Miriam

Other32935-4RI · Bcbs

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Deepak Thiagarajan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2961596085

PECOS Enrollment IDI20110419000793

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Deepak Thiagarajan reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Deepak Thiagarajan, A Professional Medical Corporation

Same address

Internal Medicine

7974 HAVEN AVE STE 210
Rancho Cucamonga, CA 91730

Reassigned Medicare billing, California enrollment

NPI 1043658644 (909) 881-5994

United Hospitalist Inc.

Same address

Internal Medicine

7974 HAVEN AVE STE 210
Rancho Cucamonga, CA 91730

Reassigned Medicare billing, California enrollment
18 clinicians in this Medicare group

NPI 1700908480 (909) 941-0661

Inpatient Specialists Of California, PC

17 mi

Internal Medicine

2101 N WATERMAN AVE
San Bernardino, CA 92404

Reassigned Medicare billing, California enrollment
1,216 clinicians in this Medicare group

NPI 1952792475 (615) 377-5658

Hospitalist Medicine Physicians Of California, Inc

35 mi

Internal Medicine

18300 US HIGHWAY 18
Apple Valley, CA 92307

Reassigned Medicare billing, California enrollment
914 clinicians in this Medicare group

NPI 1184663965 (760) 946-4233

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

1,026 services184 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

343 services55 patients

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

332 services33 patients

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308

A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.

140 services26 patients

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

92 services53 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

77 services77 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

46 services28 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

38 services31 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

22 services11 patients

Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310

A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.

17 services14 patients

Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes 99305

An initial nursing facility visit per day is a service where a healthcare professional spends about 35 minutes assessing a patient's health status. This includes reviewing medical history, conducting a physical exam, and developing a care plan based on the patient's needs.

14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91730 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$179.42 typical visit price

range $59.60 – $179.42

Typical copayment $44.85 (range $14.90 – $44.85)

Most-billed visit code 99205

Established Patient

$104.64 typical visit price

range $19.37 – $146.42

Typical copayment $26.16 (range $4.84 – $36.60)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan

Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…

79%92 patients4/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 9

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035

Other-Enteral and Parenteral · category OB006N

2 suppliers34 claims913 services$4.39 avg. paid by Medicare

Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152

Other-Enteral and Parenteral · category OB006N

2 suppliers16 claims6,624 services$0.27 avg. paid by Medicare

Enteral formula, nutritionally complete, for special metabolic needs, excludes inherited disease of metabolism, includes altered composition of proteins, fats, carbohydrates, vitamins and/or minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4154

Other-Enteral and Parenteral · category OB006N

1 supplier13 claims7,709 services$0.58 avg. paid by Medicare

Enteral nutrition infusion pump, any type B9002

Other-Enteral and Parenteral · category OB005N

2 suppliers27 claims27 services$54.40 avg. paid by Medicare

Home ventilator, any type, used with invasive interface, (e.g., tracheostomy tube) E0465

DME-Other DME · category DE005N

1 supplier24 claims24 services$776.41 avg. paid by Medicare

Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) E0466

DME-Other DME · category DE005N

2 suppliers24 claims24 services$776.41 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DEEPAK THIAGARAJAN, A PROFESSIONAL MEDICAL CORPORATION

Internal Medicine