Richard Arroyo-Diaz, MD
Internal Medicine Physician · Port Lavaca, TX
Richard Arroyo-Diaz, MD is an internal medicine physician with a practice address in Port Lavaca, Texas, and NPI 1629005418, issued on Jun 27, 2006. Check the license (Texas J3731, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Richard Arroyo-Diaz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- J3731 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1016 N Virginia St, Port Lavaca, TX 77979
- Phone
- (361) 552-0325
- Enumerated
- Jun 27, 2006
- Record last updated
- Jul 21, 2022
- Fax
- (361) 552-8759
- Medicaid ID
- 126447504 TX
- Medicare enrollment
- Enrolled (PECOS I20100115000648); accepts Medicare assignment
- Medical or professional school
- Ponce School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 1016 N Virginia St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Richard Arroyo-Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license J3731Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average internal medicine physician in 2024
11,671 Medicare Part D claims for 603 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 111 claims were for opioids.
Most prescribed
- Amlodipine Besylate642 claims
- Meloxicam555 claims
- Atorvastatin Calcium433 claims
- Levothyroxine Sodium415 claims
- Pantoprazole Sodium372 claims
- Irbesartan315 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: $114.40
5 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. 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.
One hospital affiliation
- Memorial Medical CenterPort Lavaca, TX · Critical Access Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Richard Arroyo-Diaz among 9,175 internal medicine physician records in Texas
Richard Arroyo-Diaz, MD is one of 9,175 internal medicine physician records with a practice address in Texas. 82% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1986 · median 2004 among the 6,088 with a school on file
- Record last updated2022 · 49% 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 Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
4 internal medicine physician records list a practice address in Port Lavaca
They are 4 of the 106 NPPES records with a practice address in Port Lavaca, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Port Lavaca → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Don Bunnell, MDPort Lavaca, TX 779791033123799
- Leigh Falcon, M.D.Port Lavaca, TX 779791871738286
- Mau Shong Lin, MDPort Lavaca, TX 779791275631954
- Jennifer Gonzales, M.D.Cuero, TX 779541548304843
- Adjoa Hanson, M.D.Cuero, TX 779541962782631
- Mitchell Dullnig, M.D.Sisterdale, TX 780061669600573
- Steven Dunlap, M.D.Boerne, TX 780061881670677
- Terry Grover, D.O.Boerne, TX 780061548263759
Common questions
What is Richard Arroyo-Diaz, MD's NPI number?
Richard Arroyo-Diaz, MD's National Provider Identifier (NPI) is 1629005418, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard Arroyo-Diaz, MD located?
The NPPES record lists a practice address at 1016 N Virginia St, Port Lavaca, TX, 77979. Phone: (361) 552-0325. Providers update this record themselves, so call before visiting.
How can I verify Richard Arroyo-Diaz, MD's license?
NPPES lists Texas license number J3731, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Richard Arroyo-Diaz, MD prescribe under Medicare Part D?
In 2024, Richard Arroyo-Diaz, MD had 11,671 Medicare Part D claims for 603 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.