Dr. Thillaiampalam Srijaerajah, MD
- Medicare services, 2024
- 754
- Medicare patients, 2024
- 264
- Part D claims, 2024
- 9,367
- Hospital affiliations
- 1
- Industry payments
- $3,696
- Practice address
- 1809 W Redlands Blvd, Redlands, CA 92373
- Practice phone
- Call (909) 289-4075
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cajon Medical Group
Redlands, California
Find Dr. Srijaerajah's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Thillaiampalam Srijaerajah is an internist in Redlands, California
Dr. Srijaerajah practices at Cajon Medical Group in Redlands, California.
Dr. Srijaerajah's NPI, 1538271002, was assigned on August 31, 2006. Dr. Srijaerajah graduated from University of Peradeniya FOM in 1971. Dr. Srijaerajah holds California license A33938.
- NPI
- 1538271002NPI Registry (opens in a new tab)
- NPI enumeration date
- August 31, 2006
- NPI status
- Active
- Practice phone
- (909) 289-4075
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Thillaiampalam Srijaerajah practices at Cajon Medical Group in Redlands, California
Dr. Srijaerajah's primary practice is Cajon Medical Group, at 1809 W Redlands Blvd, Redlands, CA 92373 in San Bernardino County. The practice phone is (909) 289-4075.
- Cajon Medical Group1809 W Redlands Blvd, Redlands, CA 92373 · San Bernardino CountyPhone(909) 289-4075
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thillaiampalam Srijaerajah is affiliated with 5 sites of care and 1 medical group
Dr. Srijaerajah's primary practice is Cajon Medical Group in Redlands, California. Dr. Srijaerajah is also affiliated with Antelope Valley Medical Center. The medical group on file is Cajon Medical Group. Dmand AI also links Dr. Srijaerajah to 2 more home health agencies and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thillaiampalam Srijaerajah's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Srijaerajah practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cajon Medical Group | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thillaiampalam Srijaerajah is one of 16,751 internists in California
Internal medicine is Dr. Srijaerajah's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Srijaerajah is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute gastroduodenitis, acute mini-stroke (TIA), acute sinusitis, acute skin infection, anxiety, arthritis and asthma among the conditions Dr. Srijaerajah treats.
Internists near Dr. Srijaerajah
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thillaiampalam Srijaerajah billed Medicare for 754 services in 2024
CMS data shows 754 Medicare services from Dr. Srijaerajah across 8 procedure codes in 2024, for 264 Medicare patients. Medicare paid $44,482 for them. Every service was in an office.
Dr. Srijaerajah's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7522024: 61518%
- Tests and treatments
- 2023: 1032024: 4952%
- Lab and pathology
- 2023: 232024: 3657%
- Surgery
- 2023: 522024: 3435%
- Other services
- 2023: 412024: 2051%
Dr. Srijaerajah compared with the California median for internists, 2024
- Dr. Srijaerajah
- California median
- Medicare services
- 754vs 3612.1 times
- Medicare patients
- 264vs 15175% above
- Part D claims
- 8,481vs 42120.1 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Srijaerajah's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Srijaerajah?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Srijaerajah and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thillaiampalam Srijaerajah treated 264 Medicare patients in 2024, average age 74
CMS counts 264 Medicare patients who saw Dr. Srijaerajah in 2024. The largest group is 65 to 74, with 110 patients. 73% of them have high blood pressure, and 72% have high cholesterol. 26% are also on Medicaid. Their average risk score is 1.15, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Srijaerajah's median patient age at 70, with 55% women.
Dr. Srijaerajah's Medicare patients by age, 2024
Dr. Srijaerajah's Medicare patients by sex, 2024
- Women15358%
- Men11142%
Chronic conditions among Dr. Srijaerajah's Medicare patients, 2024
- High blood pressure73%
- High cholesterol72%
- Diabetes54%
- Arthritis35%
- Ischemic heart disease22%
- COPD17%
- Heart failure17%
- Mood disorders17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Srijaerajah's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thillaiampalam Srijaerajah wrote 9,367 Medicare Part D claims in 2024
In 2024, Dr. Srijaerajah wrote 9,367 Medicare Part D claims for 605 patients. 86% of them were for generic drugs. CMS names the drug for 8,481 of them, across 132 drugs with 11 or more claims each, at $818,203 in total drug cost. In 2023, CMS named 8,922 claims across 136 drugs.
Dr. Srijaerajah's Part D claims by kind of drug, 2024
- Generic8,009 claims86%
- Brand-name1,261 claims13%
- Other97 claims1%
Dr. Srijaerajah's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Srijaerajah's Part D claims, 2024
- Opioids0%21 of 9,367 claims
- Antibiotics2%227 of 9,367 claims
- Antipsychotics, patients 65 and over0%46 of 9,367 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8,9222024: 8,4815%
Drugs named by CMS: 132 in 2024, 136 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Thillaiampalam Srijaerajah received $3,696 in industry payments from 2016 to 2025
CMS Open Payments shows 147 general payments to Dr. Srijaerajah from 19 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. GlaxoSmithKline, LLC. paid the most, $969.
General payments to Dr. Srijaerajah by program year, 2016 to 2025
Companies that paid Dr. Srijaerajah the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thillaiampalam Srijaerajah has 1 award and honors on record
Dmand AI lists 1 award for Dr. Srijaerajah, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Srijaerajah
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Thillaiampalam Srijaerajah graduated from University of Peradeniya FOM
Dr. Srijaerajah graduated from University of Peradeniya FOM in 1971.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Thillaiampalam Srijaerajah accepts plans from 12 insurance carriers
Dr. Srijaerajah is in network with 12 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- Blue Cross Blue Shield of Massachusetts
- Excellus BlueCross BlueShield
- HCSC
- Molina
- Regence Health Plans
- +4 more carriersWith a free account
Plan types Dr. Srijaerajah accepts, by number of carriers
- Medicare8
- PPO7
- HMO5
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Thillaiampalam Srijaerajah's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Thillaiampalam Srijaerajah
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Thillaiampalam Srijaerajah's NPI number?
Dr. Thillaiampalam Srijaerajah's NPI number is 1538271002. It was assigned on August 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thillaiampalam Srijaerajah?
Dr. Thillaiampalam Srijaerajah is an internist in Redlands, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thillaiampalam Srijaerajah practice?
Dr. Srijaerajah practices at 1809 W Redlands Blvd, Redlands, CA 92373. Dr. Srijaerajah's primary practice is Cajon Medical Group in Redlands, California. Dmand AI also links Dr. Srijaerajah to 2 home health agencies and 1 group practice or clinic.
What is Dr. Thillaiampalam Srijaerajah's office phone number?
The practice phone on file for Dr. Srijaerajah is (909) 289-4075.
What is Dr. Thillaiampalam Srijaerajah's medical license number?
Dr. Srijaerajah holds California license A33938.
Which hospitals is Dr. Thillaiampalam Srijaerajah affiliated with?
Dr. Srijaerajah is affiliated with Antelope Valley Medical Center.
What medical group is Dr. Thillaiampalam Srijaerajah part of?
Dr. Srijaerajah is linked to Cajon Medical Group.
Does Dr. Thillaiampalam Srijaerajah accept Medicare?
Yes. CMS data shows Dr. Srijaerajah billed Medicare for 754 services in 2024.
How many Medicare patients does Dr. Thillaiampalam Srijaerajah see?
CMS counts 264 Medicare patients who saw Dr. Srijaerajah in 2024, with an average age of 74.
What services does Dr. Thillaiampalam Srijaerajah bill to Medicare?
In 2024, Dr. Srijaerajah's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and lab and pathology test (82962).
Show 5 more questionsShow fewer questions
Where did Dr. Thillaiampalam Srijaerajah go to medical school?
Dr. Srijaerajah graduated from University of Peradeniya FOM in 1971.
What drugs does Dr. Thillaiampalam Srijaerajah prescribe most?
In 2024 Medicare Part D data, Dr. Srijaerajah's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl.
Has Dr. Thillaiampalam Srijaerajah received payments from drug or device companies?
CMS Open Payments shows $3,696 in general payments to Dr. Srijaerajah from 19 companies from 2016 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Thillaiampalam Srijaerajah been practicing?
Dr. Srijaerajah graduated from medical school in 1971, 55 years ago.
What insurance does Dr. Thillaiampalam Srijaerajah accept?
Dr. Srijaerajah is in network with 12 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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