Dr. Christopher M. Rombaoa, MD

  • San Francisco, CA
  • Gastroenterologist
NPI1225457211PAC ID7214205236
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
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Personal email
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Mobile number
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Social profiles

Primary practice

Golden Gate Endoscopy Center

Surgery Center - Medicare-Certified · San Francisco, California

See all 7 affiliations

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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 and contact details
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
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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 Center
    3370 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.

See all 7 affiliations for Dr. Rombaoa

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.

EHR by site
SiteEHR vendor and product
Golden Gate Endoscopy CenterAvailable with a free account
+4 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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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, CaliforniaPrimaryLicense 1147334 · 2015 to 2025 · taxonomy 207RG0100X

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.

Medicare services, 2024513
Medicare patients218
Paid by Medicare$56,527
Procedure codes12

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.

See all procedures by Dr. Rombaoa

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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.

Medicare patients, 2024218
Average age72
Average risk score1.39
Also on Medicaid28%

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

  1. High cholesterol73%
  2. High blood pressure65%
  3. Arthritis44%
  4. Mood disorders29%
  5. Anxiety27%
  6. Depression27%
  7. Chronic kidney disease25%
  8. 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.

Part D claims, 2024599
Drugs named by CMS13
Total drug cost$127,411
Part D patients183

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.

See all prescribing by Dr. Rombaoa

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)

For MedTech and pharma teams

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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

$5.8Kin total
  • 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.

See all payments to Dr. Rombaoa

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.

  1. Medical schoolTufts University School Of Medicine
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of 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

  1. PPO9
  2. Medicare7
  3. HMO6
  4. EPO4
  5. POS3

Source: Dmand AI Insurance Network Data

Sources for Dr. Christopher M. Rombaoa's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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.

Show 7 more questionsShow fewer questions

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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