DIEGO ANDRES CASTELLON MD
NPI 1306331665
Internal Medicine - Infectious Disease in San Angelo, TX

Q: What is Diego Castellon's NPI number?

The NPI number for Diego Castellon is 1306331665. It was assigned to this individual provider in the NPPES registry on June 28, 2018.

Q: What is Diego Castellon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Q: When was this NPI record last updated?

The NPPES record for Diego Castellon was last updated on June 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 28, 2018PECOS EnrolledAccepts Medicare Assignment

120 E HARRIS AVE, SAN ANGELO, TX 76903(325) 747-6741(325) 747-8377 Get Directions Write a Review

NPPES record last updated: June 30, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jun 30, 2025, Feb 6, 2025, Jun 18, 2024 and 1 more (4 updates tracked since 2018).

On this page

About Diego Andres Castellon Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DIEGO ANDRES CASTELLON MD (NPI 1306331665) is an individual infectious disease provider in San Angelo, Texas, licensed in New York (326673) and active in the NPI registry since June 2018. He is enrolled in Medicare PECOS, is affiliated with Shannon Medical Center, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1306331665

Entity TypeIndividualMale

Primary Taxonomy207RI0200X

Provider Legal NameDIEGO ANDRES CASTELLONCredential: MD

Location Address120 E HARRIS AVESan Angelo, TX 76903-5904

Mailing Address120 E Harris AveSan Angelo, TX 76903-5904 · (325) 747-6741 · Fax (325) 747-8377

Phone(325) 747-6741

Fax(325) 747-8377

Sole ProprietorNo

Medical School CMSOtherGraduated 2017

Enumeration DateJune 28, 2018

Last NPPES UpdateJune 30, 20254 updates tracked since enumeration

NPPES CertifiedJune 30, 2025

✔ NPI 1306331665 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

License✔ Licensed in NY · 326673

Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

Also ListedInternal MedicineTaxonomy 207R00000X · License V4891 (TX)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

120 E HARRIS AVE, San Angelo, TX 76903

Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Diego Andres Castellon Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2668825639

PECOS Enrollment IDI20241223001874

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Diego Castellon reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Shannon Clinic

0.1 mi

Family Medicine

120 E BEAUREGARD AVE
San Angelo, TX 76903

Reassigned Medicare billing, Texas enrollment
671 clinicians in this Medicare group

NPI 1770587149 (325) 658-1511

Tjh Medical Services, P.C.

1,612 mi

Internal Medicine

8906 135TH ST
Jamaica, NY 11418

Reassigned Medicare billing, New York enrollment
Medicare enrollment name: Tjh Medical Services PC
497 clinicians in this Medicare group

NPI 1184670465 (718) 206-6742

Jamaica Hospital

1,612 mi

Emergency Medical Services

8900 VAN WYCK EXPWY
Jamaica, NY 11418

Reassigned Medicare billing, New York enrollment
738 clinicians in this Medicare group

NPI 1477505220 (718) 206-8918

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

81 services36 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

50 services48 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

26 services25 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

16 services12 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Shannon Medical Center

Acute Care Hospitals · San Angelo, TX

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number450571

Location120 E Harris Ave.San Angelo, TX 76903 · Tom Green County

Emergency services Birthing friendly

Kimble Hospital

Critical Access Hospitals · Junction, TX

OwnershipProprietary

CMS Certification Number451306

Location349 Reid RoadJunction, TX 76849 · Kimble County

Emergency services

Lillian M Hudspeth Memorial Hospital

Critical Access Hospitals · Sonora, TX

OwnershipGovernment - Hospital District or Authority

CMS Certification Number451324

Location308 HudspethSonora, TX 76950 · Sutton County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 76903 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$126.40 typical visit price

range $54.84 – $166.88

Typical copayment $31.60 (range $13.71 – $41.72)

Most-billed visit code 99204

Established Patient

$97.05 typical visit price

range $17.52 – $136.11

Typical copayment $24.26 (range $4.38 – $34.02)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. STEPHANIE WALLS MCCANN PHARM. D.

Pharmacist