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Dr. Runi Chattopadhyay, MD
NPI1821055336PAC ID2264458306
- Medicare services, 2024
- 373
- Medicare patients, 2024
- 185
- Part D claims, 2024
- 42
- Publications
- 2
- Hospital affiliations
- 1
- Practice address
- 1501 Trousdale Drive, Burlingame, CA 94010
- Practice phone
- Call (650) 696-5400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chattopadhyay'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. Runi Chattopadhyay is a general surgeon in Burlingame, California
Dr. Chattopadhyay practices at Mills-Peninsula Medical Center in Burlingame, California, part of Sutter Health.
Dr. Chattopadhyay's NPI, 1821055336, was assigned on April 27, 2006. Dr. Chattopadhyay graduated from McGill University Faculty of Medicine in 1996. Dr. Chattopadhyay holds California license A91895.
NPI and contact details
- NPI
- 1821055336NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264458306
- NPI enumeration date
- April 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (650) 696-5400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Runi Chattopadhyay practices at Mills-Peninsula Medical Center in Burlingame, California
Dr. Chattopadhyay's primary practice is Mills-Peninsula Medical Center, at 1501 Trousdale Drive, Burlingame, CA 94010 in San Mateo County. The practice phone is (650) 696-5400.
- Mills-Peninsula Medical Center1501 Trousdale Drive, Burlingame, CA 94010 · San Mateo CountyPhone(650) 696-5400
Source: Dmand AI Affiliation Data
Dr. Runi Chattopadhyay is affiliated with 2 sites of care and 1 medical group
Dr. Chattopadhyay's primary practice is Mills-Peninsula Medical Center in Burlingame, California, part of Sutter Health. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Chattopadhyay to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Runi Chattopadhyay's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chattopadhyay practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mills-Peninsula Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Runi Chattopadhyay is one of 2,926 general surgeons in California
Surgery is Dr. Chattopadhyay's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Chattopadhyay is board certified in surgery by the American Board of Surgery. Dr. Chattopadhyay is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists breast reconstruction and mastectomy among the conditions Dr. Chattopadhyay treats.
General surgeons near Dr. Chattopadhyay
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
2,926general surgeons in California13general surgeons in Burlingame10general surgeons at Mills-Peninsula Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Runi Chattopadhyay billed Medicare for 373 services in 2024
CMS data shows 373 Medicare services from Dr. Chattopadhyay across 6 procedure codes in 2024, for 185 Medicare patients. Medicare paid $76,556 for them.
Medicare services, 2024373
Medicare patients185
Paid by Medicare$76,556
Procedure codes6
Dr. Chattopadhyay's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2272024: 26416%
- Surgery
- 2023: 432024: 7881%
- Other services
- 2023: 272024: 3115%
Where Dr. Chattopadhyay's Medicare services took place, 2024
- In an office29579%
- In a facility7821%
Dr. Chattopadhyay compared with the California median for general surgeons, 2024
- Dr. Chattopadhyay
- California median
- Medicare services
- 373vs 1662.2 times
- Medicare patients
- 185vs 12153% above
- Part D claims
- 27vs 3421% below
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Chattopadhyay'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Runi Chattopadhyay treated 185 Medicare patients in 2024, average age 74
CMS counts 185 Medicare patients who saw Dr. Chattopadhyay in 2024. The largest group is 65 to 74, with 101 patients. 72% of them have cancer, and 68% have high cholesterol. 6% are also on Medicaid. Their average risk score is 0.82, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chattopadhyay's median patient age at 53, with 97% women.
Medicare patients, 2024185
Average age74
Average risk score0.82
Also on Medicaid6%
Dr. Chattopadhyay's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Chattopadhyay's Medicare patients, 2024
- Cancer72%
- High cholesterol68%
- High blood pressure48%
- Osteoporosis35%
- Arthritis31%
- Anxiety21%
- Diabetes15%
- Mood disorders15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chattopadhyay's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women97%
- Men1%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Runi Chattopadhyay wrote 42 Medicare Part D claims in 2024
In 2024, Dr. Chattopadhyay wrote 42 Medicare Part D claims for 34 patients. 100% of them were for generic drugs. CMS names the drug for 27 of them, across 1 drug with 11 or more claims each, at $115 in total drug cost. In 2023, CMS named 20 claims across 1 drug.
Part D claims, 202442
Drugs named by CMS1
Total drug cost$115
Part D patients34
Dr. Chattopadhyay'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. Chattopadhyay's Part D claims, 2024
- Opioids64%27 of 42 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: 202024: 2735%
Drugs named by CMS: 1 in 2024, 1 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. Runi Chattopadhyay ranks in the 95th percentile for mastectomy in Medicare
Dr. Chattopadhyay accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 54 procedures of mastectomy by Dr. Chattopadhyay, more than 95% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Chattopadhyay ranks in Medicare procedure volume
- Mastectomy
- 95th percentile54 procedures
- Melanoma (skin cancer) excision
- 84th percentile40 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Runi Chattopadhyay has 2 publications on record
Dmand AI links 2 papers to Dr. Chattopadhyay in 2016.
Papers2
Recent publications by Dr. Chattopadhyay
Can J Rural Med
Cross InfectionHealth Care SurveysHospitals, Community
See who Dr. Chattopadhyay researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chattopadhyay works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Runi Chattopadhyay received $211 in industry payments from 2019 to 2021
CMS Open Payments shows 2 general payments to Dr. Chattopadhyay from 2 drug and device companies from 2019 to 2021. Food and beverage make up the largest share, 100% of the total. Focal Therapeutics, Inc. paid the most, $108.
General payments to Dr. Chattopadhyay by program year, 2019 to 2021
Companies that paid Dr. Chattopadhyay the most, 2019 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Runi Chattopadhyay has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Chattopadhyay, most recently Regional Top Doctor in 2014.
Awards and honors for Dr. Chattopadhyay
- 2014
- Regional Top Doctor
- 2012
- ACS Fellow
- Undated
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Runi Chattopadhyay graduated from McGill University Faculty of Medicine
Dr. Chattopadhyay graduated from McGill University Faculty of Medicine in 1996. Dr. Chattopadhyay is a member of ACS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Runi Chattopadhyay accepts plans from 11 insurance carriers
Dr. Chattopadhyay is in network with 11 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- +3 more carriersWith a free account
Plan types Dr. Chattopadhyay accepts, by number of carriers
- PPO7
- HMO6
- EPO4
- Medicare4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Runi Chattopadhyay'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Runi Chattopadhyay
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. Runi Chattopadhyay's NPI number?
Dr. Runi Chattopadhyay's NPI number is 1821055336. It was assigned on April 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Runi Chattopadhyay?
Dr. Runi Chattopadhyay is a general surgeon in Burlingame, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Runi Chattopadhyay practice?
Dr. Chattopadhyay practices at 1501 Trousdale Drive, Burlingame, CA 94010. Dr. Chattopadhyay's primary practice is Mills-Peninsula Medical Center in Burlingame, California, part of Sutter Health. Dmand AI also links Dr. Chattopadhyay to 1 group practice or clinic.
What is Dr. Runi Chattopadhyay's office phone number?
The practice phone on file for Dr. Chattopadhyay is (650) 696-5400.
What is Dr. Runi Chattopadhyay's medical license number?
Dr. Chattopadhyay holds California license A91895.
Which hospitals is Dr. Runi Chattopadhyay affiliated with?
Dr. Chattopadhyay practices at Mills-Peninsula Medical Center in Burlingame, California.
What medical group is Dr. Runi Chattopadhyay part of?
Dr. Chattopadhyay is linked to Palo Alto Foundation Medical Group.
Does Dr. Runi Chattopadhyay accept Medicare?
Yes. CMS data shows Dr. Chattopadhyay billed Medicare for 373 services in 2024, and Dr. Chattopadhyay accepts Medicare assignment.
How many Medicare patients does Dr. Runi Chattopadhyay see?
CMS counts 185 Medicare patients who saw Dr. Chattopadhyay in 2024, with an average age of 74.
Is Dr. Runi Chattopadhyay board certified?
Yes. Dr. Chattopadhyay is board certified in surgery by the American Board of Surgery.
Show 7 more questionsShow fewer questions
What services does Dr. Runi Chattopadhyay bill to Medicare?
In 2024, Dr. Chattopadhyay's most billed Medicare services were office visit, established patient (99215), office visit, new patient (99205) and surgery: skin and soft tissue (14001).
Where did Dr. Runi Chattopadhyay go to medical school?
Dr. Chattopadhyay graduated from McGill University Faculty of Medicine in 1996.
What drugs does Dr. Runi Chattopadhyay prescribe most?
In 2024 Medicare Part D data, Dr. Chattopadhyay's most prescribed drugs by claims were Acetaminophen-Codeine.
Has Dr. Runi Chattopadhyay received payments from drug or device companies?
CMS Open Payments shows $211 in general payments to Dr. Chattopadhyay from 2 companies from 2019 to 2021. The largest total came from Focal Therapeutics, Inc.
How long has Dr. Runi Chattopadhyay been practicing?
Dr. Chattopadhyay graduated from medical school in 1996, 30 years ago.
Does Dr. Runi Chattopadhyay do research?
Dmand AI links 2 publications to Dr. Chattopadhyay.
What insurance does Dr. Runi Chattopadhyay accept?
Dr. Chattopadhyay is in network with 11 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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