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Internal Medicine

Jason S. Javillo, MD

Works at hospitals in Randallstown, MD · Baltimore, MD · Maryland

Summary

Dr. Jason S. Javillo, MD is an internal medicine doctor at 2435 W Belvedere Ave, 22 Sinai General Medicine Associates, Baltimore, MD 21215. Phone: (410) 601-6840. May accept Medicare assignment. In 2024, Jason S. Javillo had 309 Original Medicare patients and 740 services. NPI 1366472557. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Jason S. Javillo, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Jason S. Javillo accept Medicare assignment?
Medicare's clinician data says Jason S. Javillo may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Jason S. Javillo see?
In 2024, CMS data shows 309 Original Medicare patients and 740 services for Jason S. Javillo. This counts Original Medicare only and measures volume, not quality.
What is Jason S. Javillo's NPI number?
1366472557. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Jason S. Javillo, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients309
Services billed to Medicare740
Different services or procedures25
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)251 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)190 services
  3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)110 services
  4. Administration of influenza virus vaccine (G0008)48 services
  5. Influenza vaccine split virus, preservative free (90662)42 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol62%
  • Diabetes37%
  • Arthritis33%
  • Ischemic heart disease20%
  • Chronic kidney disease20%

Hospitals where Jason S. Javillo works

Medicare's Facility Affiliation Data lists Jason S. Javillo at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Northwest Hospital CenterRandallstown, MD · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 210040
  • Sinai Hospital of BaltimoreBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210012

Practice locations

Addresses where Jason S. Javillo is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Jason S. Javillo as a member of this group (CMS data updated October 2, 2026).

  • Sinai Hospital of Baltimore, Inc380 clinicians in the group

Specialties

Find other Internal Medicine doctors in Maryland →

Other internal medicine doctors in Baltimore

Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.

All internal medicine doctors in Baltimore →

Other clinicians in Sinai Hospital of Baltimore, Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year1999 (27 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1366472557
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians