Mathew S. Isho, MD
Colon & Rectal Surgery Physician · San Diego, CA
Mathew S. Isho, MD is a colon & rectal surgery physician with a practice address in San Diego, California, and NPI 1841235645, issued on Jun 17, 2006. Check the license (California A93470, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mathew S. Isho
- Credential
- MD
- Primary taxonomy
- Colon & Rectal Surgery Physician 208C00000X
- License number
- A93470 CA
Self-reported in NPPES; status is on the state search - Practice location
- 550 Washington St, San Diego, CA 92103
- Phone
- (619) 686-4011
- Enumerated
- Jun 17, 2006
- Record last updated
- Jun 12, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (619) 686-4041
- Medicare enrollment
- Enrolled (PECOS I20060710000279); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest colon & rectal surgery physician records → All 198 in California → Look up another NPI →
Also registered at 550 Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mathew S. Isho in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A93470Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% more Medicare Part D claims than the average colon & rectal surgery physician in 2024
344 Medicare Part D claims for 200 beneficiaries, against an average of 192 among the 1,836 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims. 77 claims were for opioids.
Most prescribed
- Clenpiq47 claims
- Hydrocodone-Acetaminophen41 claims
- Gavilyte-G38 claims
- Neomycin Sulfate36 claims
- Erythromycin34 claims
- Tramadol Hcl28 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $6,615.55
14 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 1,524 providers of this specialty with any payment received $3,468.16 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- ON Call Specialists Medical Group OF San Diego IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mathew S. Isho among 198 colon & rectal surgery physician records in California
Mathew S. Isho, MD is one of 198 colon & rectal surgery physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 57% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1994 · median 2002 among the 149 with a school on file
- Record last updated2020 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208C00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Colon & Rectal Surgery Physician providers in California
There are 198 colon & rectal surgery physician records in California.
All 198 in California → Every provider in San Diego → Colon & Rectal Surgery Physician nationwide →
The 8 colon & rectal surgery physician records with the nearest ZIP codes
- Benjamin Abbadessa, M.D.San Diego, CA 921031255593612
- Samuel Eisenstein, MDSan Diego, CA 921031194983932
- Shanglei Liu, M.D.San Diego, CA 921031043558653
- Nicole Lopez, M.DSan Diego, CA 921031518163005
- Jeffrey Toman, M.D.San Diego, CA 921031134112626
- Elisabeth McLemore, M.D.La Jolla, CA 920931649255621
- Dhruvil Gandhi, M.D.Vista, CA 920831083887277
- Pamela Lee, MDSan Diego, CA 921231356665657
Common questions
What is Mathew S. Isho, MD's NPI number?
Mathew S. Isho, MD's National Provider Identifier (NPI) is 1841235645, issued on Jun 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mathew S. Isho, MD located?
The NPPES record lists a practice address at 550 Washington St, San Diego, CA, 92103. Phone: (619) 686-4011. Providers update this record themselves, so call before visiting.
How can I verify Mathew S. Isho, MD's license?
NPPES lists California license number A93470, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mathew S. Isho, MD prescribe under Medicare Part D?
In 2024, Mathew S. Isho, MD had 344 Medicare Part D claims for 200 beneficiaries; the average among colon & rectal surgery physician prescribers was 192. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.