Sharaf Ali Diwan, MD

Medicare activity in 2024

Official CMS public-use data for Sharaf Ali Diwan, 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.

Most frequent services

1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)3,190 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)477 services
3. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)355 services
4. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)39 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)24 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 cholesterol75%
• Arthritis60%
• Chronic kidney disease59%
• Diabetes57%
• Ischemic heart disease56%

Hospitals where Sharaf Ali Diwan works

Medicare's Facility Affiliation Data lists Sharaf Ali Diwan 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.

• HCA Houston Healthcare ConroeConroe, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · CCN 450222
• HCA Houston Healthcare KingwoodKingwood, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450775
• HCA Houston Healthcare NorthwestHouston, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · CCN 450638
• HCA Houston Healthcare TomballTomball, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450670
• Huntsville Memorial HospitalHuntsville, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 450347

Practice locations

Addresses where Sharaf Ali Diwan is enrolled with Medicare (CMS data updated October 2, 2026).

• 18220 State Hwy 249, Suite 230Houston, TX 77070 (832) 604‑0005

Specialties

• Infectious Diseaseprimary

Find other Infectious Disease doctors in Texas →

Other infectious disease doctors in Houston

Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.

• Amna Ahmed, MD
• Bin Ni, MD
• Rojelio Mejia, MD
• Yuriko Fukuta, MD
• Bruno P. Granwehr, MD
• Rodrigo Hasbun, MD
• George M. Viola, MD
• Galant Chan, MD

All infectious disease doctors in Houston →

Clinician information

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