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Dr. Matthew E. Sitzer, MD
NPI1871641860PAC ID0749313120
- Part D claims, 2024
- 954
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $928
- Medical groups
- 3
- Practice address
- 400 E St, Chula Vista, CA 91910
- Practice phone
- Call (619) 621-2622
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Alfa Surgery Center
Surgery Center - Medicare-Certified · Chula Vista, California
Find Dr. Sitzer'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. Matthew E. Sitzer is a gastroenterologist in Chula Vista, California
Dr. Sitzer practices at Alfa Surgery Center in Chula Vista, California.
Dr. Sitzer's NPI, 1871641860, was assigned on January 8, 2007. Dr. Sitzer graduated from UC San Diego School of Medicine in 1986. Dr. Sitzer's California license number on file is G62045.
NPI and contact details
- NPI
- 1871641860NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749313120
- NPI enumeration date
- January 8, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 621-2622
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Matthew E. Sitzer practices at Alfa Surgery Center in Chula Vista, California
Dr. Sitzer's primary practice is Alfa Surgery Center, at 400 E St, Chula Vista, CA 91910. The practice phone is (619) 621-2622.
- Alfa Surgery Center400 E St, Chula Vista, CA 91910Phone(619) 621-2622
Source: Dmand AI Affiliation Data
Dr. Matthew E. Sitzer is affiliated with 2 sites of care and 3 medical groups
Dr. Sitzer's primary practice is Alfa Surgery Center in Chula Vista, California. Dr. Sitzer is also affiliated with Kaiser Permanente Zion Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Sitzer to 2 more medical groups, each named with a free account.
Alfa Surgery CenterPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Matthew E. Sitzer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sitzer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Alfa Surgery Center | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Matthew E. Sitzer is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Sitzer's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Sitzer is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Sitzer has a license on file in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Sitzer
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. Matthew E. Sitzer's patients have a median age of 61
Across all payers, Dmand AI patient panel data puts Dr. Sitzer's median patient age at 61, with 60% women.
Dr. Sitzer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women60%
- Men39%
Source: Dmand AI Patient Panel Data
Dr. Matthew E. Sitzer wrote 954 Medicare Part D claims in 2024
In 2024, Dr. Sitzer wrote 954 Medicare Part D claims for 457 patients. 93% of them were for generic drugs. CMS names the drug for 829 of them, across 11 drugs with 11 or more claims each, at $56,192 in total drug cost. In 2023, CMS named 783 claims across 12 drugs.
Part D claims, 2024954
Drugs named by CMS11
Total drug cost$56,192
Part D patients457
Dr. Sitzer's Part D claims by kind of drug, 2024
- Generic886 claims93%
- Brand-name68 claims7%
Dr. Sitzer'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. Sitzer's Part D claims, 2024
- Antibiotics1%13 of 954 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: 7832024: 8296%
Drugs named by CMS: 11 in 2024, 12 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
How Dr. Matthew E. Sitzer takes part in Medicare
Dr. Sitzer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
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. Matthew E. Sitzer has 1 publication on record
Dmand AI links 1 paper to Dr. Sitzer in 2022. Dr. Sitzer's most frequent co-author is Brian Jacob Lichtenstein, MD.
Papers1
Dr. Sitzer's most frequent co-authors
Recent publications by Dr. Sitzer
See who Dr. Sitzer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Sitzer works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Matthew E. Sitzer received $928 in industry payments from 2016 to 2025
CMS Open Payments shows 11 general payments to Dr. Sitzer from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Cook Medical LLC paid the most, $231.
General payments to Dr. Sitzer by program year, 2016 to 2025
Companies that paid Dr. Sitzer 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. Matthew E. Sitzer has 1 award and honors on record
Dmand AI lists 1 award for Dr. Sitzer, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Sitzer
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Matthew E. Sitzer graduated from UC San Diego School of Medicine
Dr. Sitzer graduated from UC San Diego School of Medicine in 1986.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Matthew E. Sitzer accepts plans from 2 insurance carriers
Dr. Sitzer is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Sitzer accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Matthew E. Sitzer'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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. Matthew E. Sitzer
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. Matthew E. Sitzer's NPI number?
Dr. Matthew E. Sitzer's NPI number is 1871641860. It was assigned on January 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Matthew E. Sitzer?
Dr. Matthew E. Sitzer is a gastroenterologist in Chula Vista, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Matthew E. Sitzer practice?
Dr. Sitzer practices at 400 E St, Chula Vista, CA 91910. Dr. Sitzer's primary practice is Alfa Surgery Center in Chula Vista, California. Dmand AI also links Dr. Sitzer to 2 medical groups.
What is Dr. Matthew E. Sitzer's office phone number?
The practice phone on file for Dr. Sitzer is (619) 621-2622.
What is Dr. Matthew E. Sitzer's medical license number?
Dr. Sitzer's California license number on file is G62045.
Which hospitals is Dr. Matthew E. Sitzer affiliated with?
Dr. Sitzer is affiliated with Kaiser Permanente Zion Medical Center.
What medical group is Dr. Matthew E. Sitzer part of?
Dr. Sitzer is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Sitzer to 2 more medical groups.
Does Dr. Matthew E. Sitzer accept Medicare?
Yes. CMS lists Dr. Sitzer as accepting Medicare assignment.
Is Dr. Matthew E. Sitzer board certified?
Yes. Dr. Sitzer is board certified in gastroenterology by the American Board of Internal Medicine.
Where did Dr. Matthew E. Sitzer go to medical school?
Dr. Sitzer graduated from UC San Diego School of Medicine in 1986.
Show 6 more questionsShow fewer questions
What drugs does Dr. Matthew E. Sitzer prescribe most?
In 2024 Medicare Part D data, Dr. Sitzer's most prescribed drugs by claims were Gavilyte-C, Omeprazole and Pantoprazole Sodium.
Has Dr. Matthew E. Sitzer received payments from drug or device companies?
CMS Open Payments shows $928 in general payments to Dr. Sitzer from 8 companies from 2016 to 2025. The largest total came from Cook Medical LLC.
How long has Dr. Matthew E. Sitzer been practicing?
Dr. Sitzer graduated from medical school in 1986, 40 years ago.
Does Dr. Matthew E. Sitzer do research?
Dmand AI links 1 publication to Dr. Sitzer.
Who does Dr. Matthew E. Sitzer publish with?
Dr. Sitzer's most frequent co-authors are Brian Jacob Lichtenstein, MD (1 shared paper).
What insurance does Dr. Matthew E. Sitzer accept?
Dr. Sitzer is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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