Irineo Dizon Tiangco, M.D.
Internal Medicine Physician · National City, CA
Irineo Dizon Tiangco, M.D. is an internal medicine physician with a practice address in National City, California, and NPI 1245322213, issued on Sep 28, 2006. Check the license (California A52655, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irineo Dizon Tiangco
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A52655 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2340 E 8TH St, National City, CA 91950
- Phone
- (619) 479-0320
- Enumerated
- Sep 28, 2006
- Record last updated
- Feb 23, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (619) 479-0367
- Medicaid ID
- 00A526551 CA
- Medicare enrollment
- Enrolled (PECOS I20040706001366); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2340 E 8TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Henry Shin, DPMPodiatrist1780775379
Verify Irineo Dizon Tiangco in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A52655Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.4 times the Medicare Part D claims of the average internal medicine physician in 2024
10,778 Medicare Part D claims for 503 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Rosuvastatin Calcium1,023 claims
- Amlodipine Besylate596 claims
- Atorvastatin Calcium552 claims
- Losartan Potassium472 claims
- Jardiance397 claims
- Metformin Hcl382 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: $3,836.17
71 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Irineo Dizon Tiangco among 17,696 internal medicine physician records in California
Irineo Dizon Tiangco, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1985 · median 2004 among the 11,065 with a school on file
- Record last updated2011 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 internal medicine physician records list a practice address in National City
They are 13 of the 749 NPPES records with a practice address in National City, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in National City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Andrew Alongi, M.D.National City, CA 919501194838516
- Valerie Altavas, M.D.National City, CA 919501245231174
- Arwinnah Bautista, MDNational City, CA 919501073579173
- Archie Bella, M.D.National City, CA 919501487098497
- Razi Hekmat, M.D.National City, CA 919501871501205
- Miguel Martinez, M.D.National City, CA 919501225324692
- Renato Masilungan, MDNational City, CA 919501528077757
- Aurore Oughourlian, M.D.National City, CA 919501023047016
Common questions
What is Irineo Dizon Tiangco, M.D.'s NPI number?
Irineo Dizon Tiangco, M.D.'s National Provider Identifier (NPI) is 1245322213, issued on Sep 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Irineo Dizon Tiangco, M.D. located?
The NPPES record lists a practice address at 2340 E 8TH St, National City, CA, 91950. Phone: (619) 479-0320. Providers update this record themselves, so call before visiting.
How can I verify Irineo Dizon Tiangco, M.D.'s license?
NPPES lists California license number A52655, 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 Irineo Dizon Tiangco, M.D. prescribe under Medicare Part D?
In 2024, Irineo Dizon Tiangco, M.D. had 10,778 Medicare Part D claims for 503 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.