Dr. Christopher M. Rombaoa, MD
- Medicare services, 2024
- 513
- Medicare patients, 2024
- 218
- Part D claims, 2024
- 599
- Hospital affiliations
- 4
- Industry payments
- $5,766
- Practice address
- 3370 Geary Boulevard, First Floor, San Francisco, CA 94118
- Practice phone
- Call (415) 379-7500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Golden Gate Endoscopy Center
Surgery Center - Medicare-Certified · San Francisco, California
Find Dr. Rombaoa'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. Christopher M. Rombaoa is a gastroenterologist in San Francisco, California
Dr. Rombaoa practices at Golden Gate Endoscopy Center in San Francisco, California.
Dr. Rombaoa's NPI, 1225457211, was assigned on April 7, 2014. Dr. Rombaoa graduated from Tufts University School Of Medicine in 2014. Dr. Rombaoa's California license number on file is 1147334.
- NPI
- 1225457211NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214205236
- NPI enumeration date
- April 7, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (415) 379-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Christopher M. Rombaoa practices at Golden Gate Endoscopy Center in San Francisco, California
Dr. Rombaoa's primary practice is Golden Gate Endoscopy Center, at 3370 Geary Boulevard, First Floor, San Francisco, CA 94118. The practice phone is (415) 379-7500.
- Golden Gate Endoscopy Center3370 Geary Boulevard, First Floor, San Francisco, CA 94118Phone(415) 379-7500
Source: Dmand AI Affiliation Data
Dr. Christopher M. Rombaoa is affiliated with 5 sites of care and 2 medical groups
Dr. Rombaoa's primary practice is Golden Gate Endoscopy Center in San Francisco, California. Dr. Rombaoa is also affiliated with California Pacific Medical Center Van Ness Campus. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Rombaoa to 3 more hospitals and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Christopher M. Rombaoa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rombaoa practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Golden Gate Endoscopy Center | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Christopher M. Rombaoa is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Rombaoa's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Rombaoa is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Rombaoa has a license on file in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, chronic indigestion, chronic inflammatory bowel disease (IBD), colonoscopy, gastroduodenitis, gastrointestinal bleeding, hemorrhoids and hepatitis c among the conditions Dr. Rombaoa treats.
Gastroenterologists near Dr. Rombaoa
Counts of gastroenterologists 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. Christopher M. Rombaoa billed Medicare for 513 services in 2024
CMS data shows 513 Medicare services from Dr. Rombaoa across 12 procedure codes in 2024, for 218 Medicare patients. Medicare paid $56,527 for them.
Dr. Rombaoa's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2742024: 31716%
- Other services
- 2023: 112024: 108882%
- Surgery
- 2023: 802024: 756%
- Tests and treatments
- 2023: 112024: 1318%
Where Dr. Rombaoa's Medicare services took place, 2024
- In an office34567%
- In a facility16833%
Dr. Rombaoa compared with the California median for gastroenterologists, 2024
- Dr. Rombaoa
- California median
- Medicare services
- 513vs 58612% below
- Medicare patients
- 218vs 30228% below
- Part D claims
- 462vs 38022% above
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Rombaoa'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. Rombaoa and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Christopher M. Rombaoa treated 218 Medicare patients in 2024, average age 72
CMS counts 218 Medicare patients who saw Dr. Rombaoa in 2024. The largest group is 65 to 74, with 105 patients. 73% of them have high cholesterol, and 65% have high blood pressure. 28% are also on Medicaid. Their average risk score is 1.39, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Rombaoa's median patient age at 56, with 49% women.
Dr. Rombaoa's Medicare patients by age, 2024
Dr. Rombaoa's Medicare patients by sex, 2024
- Women12055%
- Men9845%
Chronic conditions among Dr. Rombaoa's Medicare patients, 2024
- High cholesterol73%
- High blood pressure65%
- Arthritis44%
- Mood disorders29%
- Anxiety27%
- Depression27%
- Chronic kidney disease25%
- Ischemic heart disease24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rombaoa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women49%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Christopher M. Rombaoa wrote 599 Medicare Part D claims in 2024
In 2024, Dr. Rombaoa wrote 599 Medicare Part D claims for 183 patients. 68% of them were for generic drugs. CMS names the drug for 462 of them, across 13 drugs with 11 or more claims each, at $127,411 in total drug cost. In 2023, CMS named 380 claims across 13 drugs.
Dr. Rombaoa's Part D claims by kind of drug, 2024
- Generic406 claims68%
- Brand-name193 claims32%
Dr. Rombaoa'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3802024: 46222%
Drugs named by CMS: 13 in 2024, 13 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. Christopher M. Rombaoa ranks in the 66th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Rombaoa accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Rombaoa as offering telehealth. CMS counts 59 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Rombaoa, more than 66% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Rombaoa ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 66th percentile59 procedures
- Colonoscopy
- 63rd percentile48 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. Christopher M. Rombaoa received $5,766 in industry payments from 2023 to 2025
CMS Open Payments shows 92 general payments to Dr. Rombaoa from 20 drug and device companies from 2023 to 2025. Consulting fees make up the largest share, 56% of the total. Olympus Medical Systems Corporation paid the most, $3,206.
General payments to Dr. Rombaoa by program year, 2023 to 2025
General payments to Dr. Rombaoa by kind, 2023 to 2025
- Consulting fees$3,20656%
- Food and beverage$2,50343%
- Travel and lodging$401%
- Education$170%
Companies that paid Dr. Rombaoa the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Christopher M. Rombaoa graduated from Tufts University School Of Medicine
Dr. Rombaoa graduated from Tufts University School Of Medicine in 2014.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Christopher M. Rombaoa accepts plans from 13 insurance carriers
Dr. Rombaoa is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Rombaoa accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Christopher M. Rombaoa'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Christopher M. Rombaoa
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. Christopher M. Rombaoa's NPI number?
Dr. Christopher M. Rombaoa's NPI number is 1225457211. It was assigned on April 7, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Christopher M. Rombaoa?
Dr. Christopher M. Rombaoa is a gastroenterologist in San Francisco, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Christopher M. Rombaoa practice?
Dr. Rombaoa practices at 3370 Geary Boulevard, First Floor, San Francisco, CA 94118. Dr. Rombaoa's primary practice is Golden Gate Endoscopy Center in San Francisco, California. Dmand AI also links Dr. Rombaoa to 3 hospitals and 1 medical group.
What is Dr. Christopher M. Rombaoa's office phone number?
The practice phone on file for Dr. Rombaoa is (415) 379-7500.
What is Dr. Christopher M. Rombaoa's medical license number?
Dr. Rombaoa's California license number on file is 1147334.
Which hospitals is Dr. Christopher M. Rombaoa affiliated with?
Dr. Rombaoa is affiliated with California Pacific Medical Center Van Ness Campus. Dmand AI links Dr. Rombaoa to 3 more hospitals.
What medical group is Dr. Christopher M. Rombaoa part of?
Dr. Rombaoa is linked to Palo Alto Foundation Medical Group. Dmand AI links Dr. Rombaoa to 1 more medical group.
Does Dr. Christopher M. Rombaoa accept Medicare?
Yes. CMS data shows Dr. Rombaoa billed Medicare for 513 services in 2024, and Dr. Rombaoa accepts Medicare assignment.
Does Dr. Christopher M. Rombaoa offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Rombaoa as offering telehealth services.
How many Medicare patients does Dr. Christopher M. Rombaoa see?
CMS counts 218 Medicare patients who saw Dr. Rombaoa in 2024, with an average age of 72.
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Is Dr. Christopher M. Rombaoa board certified?
Yes. Dr. Rombaoa is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. Christopher M. Rombaoa bill to Medicare?
In 2024, Dr. Rombaoa's most billed Medicare services were office visit, established patient (99215), medicare service (G2211) and office visit, established patient (99214).
Where did Dr. Christopher M. Rombaoa go to medical school?
Dr. Rombaoa graduated from Tufts University School Of Medicine in 2014.
What drugs does Dr. Christopher M. Rombaoa prescribe most?
In 2024 Medicare Part D data, Dr. Rombaoa's most prescribed drugs by claims were Sod Sulf-Potass Sulf-Mag Sulf, Rabeprazole Sodium and Omeprazole.
Has Dr. Christopher M. Rombaoa received payments from drug or device companies?
CMS Open Payments shows $5,766 in general payments to Dr. Rombaoa from 20 companies from 2023 to 2025. The largest total came from Olympus Medical Systems Corporation.
How long has Dr. Christopher M. Rombaoa been practicing?
Dr. Rombaoa graduated from medical school in 2014, 12 years ago.
What insurance does Dr. Christopher M. Rombaoa accept?
Dr. Rombaoa is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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