Dr. Opkar S. Chawla, MD
- Medicare services, 2024
- 1,485
- Medicare patients, 2024
- 334
- Part D claims, 2024
- 7,591
- Hospital affiliations
- 1
- Industry payments
- $21,490
- Practice address
- 23 S Howell Ave, Centereach, NY 11720
- Practice phone
- Call (631) 444-2448
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Stony Brook Internists
Centereach, New York
Find Dr. Chawla'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. Opkar S. Chawla is an internist in Centereach, New York
Dr. Chawla practices at Stony Brook Internists in Centereach, New York.
Dr. Chawla's NPI, 1871548776, was assigned on May 23, 2006. Dr. Chawla graduated from Grant Medical College in 1985. Dr. Chawla holds New York license 183894.
- NPI
- 1871548776NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547440471
- NPI enumeration date
- May 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (631) 444-2448
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Opkar S. Chawla practices at Stony Brook Internists in Centereach, New York
Dr. Chawla's primary practice is Stony Brook Internists, at 23 S Howell Ave, Centereach, NY 11720 in Suffolk County. The practice phone is (631) 444-2448.
- Stony Brook Internists23 S Howell Ave, Centereach, NY 11720 · Suffolk CountyPhone(631) 444-2448
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Opkar S. Chawla is affiliated with 7 sites of care and 7 medical groups
Dr. Chawla's primary practice is Stony Brook Internists in Centereach, New York. Dr. Chawla is also affiliated with Stony Brook University Hospital. The medical group on file is Stony Brook Internists. Dmand AI also links Dr. Chawla to 6 more medical groups, 4 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. Opkar S. Chawla's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chawla practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stony Brook Internists | Available with a free account |
| +6 more sites and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Opkar S. Chawla is one of 9,643 internists in New York
Internal medicine is Dr. Chawla's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chawla is licensed in New York.
Specialties and state licenses
- Internal medicine, New YorkPrimary
Internists near Dr. Chawla
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. Opkar S. Chawla billed Medicare for 1,485 services in 2024
CMS data shows 1,485 Medicare services from Dr. Chawla across 10 procedure codes in 2024, for 334 Medicare patients. Medicare paid $126,390 for them. Every service was in an office.
Dr. Chawla's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0932024: 89418%
- Surgery
- 2023: 2882024: 2735%
- Other services
- 2023: 1802024: 1948%
- Tests and treatments
- 2023: 1032024: 6834%
- Lab and pathology
- 2023: 862024: 5635%
Dr. Chawla compared with the New York median for internists, 2024
- Dr. Chawla
- New York median
- Medicare services
- 1,485vs 4263.5 times
- Medicare patients
- 334vs 1582.1 times
- Part D claims
- 6,693vs 62210.8 times
Medians across 9,428 internists in New York with Dmand AI profiles that report each measure.
Dr. Chawla'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chawla and other internists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Opkar S. Chawla treated 334 Medicare patients in 2024, average age 74
CMS counts 334 Medicare patients who saw Dr. Chawla in 2024. The largest group is 65 to 74, with 142 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 24% are also on Medicaid. Their average risk score is 1.33, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chawla's median patient age at 58, with 47% women.
Dr. Chawla's Medicare patients by age, 2024
Dr. Chawla's Medicare patients by sex, 2024
- Women17552%
- Men15948%
Chronic conditions among Dr. Chawla's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis50%
- Diabetes46%
- Ischemic heart disease42%
- Chronic kidney disease26%
- Anxiety22%
- Cancer21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chawla's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women47%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Opkar S. Chawla wrote 7,591 Medicare Part D claims in 2024
In 2024, Dr. Chawla wrote 7,591 Medicare Part D claims for 548 patients. 85% of them were for generic drugs. CMS names the drug for 6,693 of them, across 122 drugs with 11 or more claims each, at $774,597 in total drug cost. In 2023, CMS named 7,123 claims across 136 drugs.
Dr. Chawla's Part D claims by kind of drug, 2024
- Generic6,443 claims85%
- Brand-name1,078 claims14%
- Other70 claims1%
Dr. Chawla'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. Chawla's Part D claims, 2024
- Opioids2%144 of 7,591 claims
- Antibiotics3%231 of 7,591 claims
- Antipsychotics, patients 65 and over0%11 of 7,591 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: 7,1232024: 6,6936%
Drugs named by CMS: 122 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
Dr. Opkar S. Chawla offers telehealth to Medicare patients
Dr. Chawla accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chawla as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Opkar S. Chawla received $21,490 in industry payments from 2016 to 2025
CMS Open Payments shows 803 general payments to Dr. Chawla from 59 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $4,077.
General payments to Dr. Chawla by program year, 2016 to 2025
General payments to Dr. Chawla by kind, 2016 to 2025
- Food and beverage$21,434100%
- Education$560%
Companies that paid Dr. Chawla 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. Opkar S. Chawla graduated from Grant Medical College
Dr. Chawla graduated from Grant Medical College in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Opkar S. Chawla'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Opkar S. Chawla
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. Opkar S. Chawla's NPI number?
Dr. Opkar S. Chawla's NPI number is 1871548776. It was assigned on May 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Opkar S. Chawla?
Dr. Opkar S. Chawla is an internist in Centereach, New York. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Opkar S. Chawla practice?
Dr. Chawla practices at 23 S Howell Ave, Centereach, NY 11720. Dr. Chawla's primary practice is Stony Brook Internists in Centereach, New York. Dmand AI also links Dr. Chawla to 6 medical groups, 4 home health agencies and 1 group practice or clinic.
What is Dr. Opkar S. Chawla's office phone number?
The practice phone on file for Dr. Chawla is (631) 444-2448.
What is Dr. Opkar S. Chawla's medical license number?
Dr. Chawla holds New York license 183894.
Which hospitals is Dr. Opkar S. Chawla affiliated with?
Dr. Chawla is affiliated with Stony Brook University Hospital.
What medical group is Dr. Opkar S. Chawla part of?
Dr. Chawla is linked to Stony Brook Internists. Dmand AI links Dr. Chawla to 6 more medical groups.
Does Dr. Opkar S. Chawla accept Medicare?
Yes. CMS data shows Dr. Chawla billed Medicare for 1,485 services in 2024, and Dr. Chawla accepts Medicare assignment.
Does Dr. Opkar S. Chawla offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chawla as offering telehealth services.
How many Medicare patients does Dr. Opkar S. Chawla see?
CMS counts 334 Medicare patients who saw Dr. Chawla in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. Opkar S. Chawla bill to Medicare?
In 2024, Dr. Chawla's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and medicare service (G0439).
Where did Dr. Opkar S. Chawla go to medical school?
Dr. Chawla graduated from Grant Medical College in 1985.
What drugs does Dr. Opkar S. Chawla prescribe most?
In 2024 Medicare Part D data, Dr. Chawla's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Levothyroxine Sodium.
Has Dr. Opkar S. Chawla received payments from drug or device companies?
CMS Open Payments shows $21,490 in general payments to Dr. Chawla from 59 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Opkar S. Chawla been practicing?
Dr. Chawla graduated from medical school in 1985, 41 years ago.
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