DR. UMER HAYYAT (MD) – Internal Medicine Physician, NPI 1851812499
Internal Medicine Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
2,132 CRITICAL CARE (INTENSIVISTS) in CA
Provider Addresses for DR. UMER HAYYAT (MD)
491 HIGH SIERRA DR
EXETER, CA 932219507
Phone: (516) 504-8102
Type: Mailing
115 MALL DR # CA93230
HANFORD, CA 932305786
Phone: (559) 582-9000
Type: Location
115 Mall Dr # Ca93230
Hanford, CA 932305786
Phone: (559) 582-9000
Type: Location
11335 CAMINITO CORRIENTE
SAN DIEGO, CA 921284567
Phone: (204) 380-5483
Type: Mailing
LewisGale Medical Center, 1900, Electric Road, Ridgewood Farm, Salem, Salem (city), Virginia, 24153, United States
SALEM, VA 241537474
Phone: (540) 682-6889
Type: Mailing
7901 FROST ST
SAN DIEGO, CA 921232701
Phone: (858) 939-3400
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 6 Open Payments records for all available years, with a total value of $221.
Total Amount is formed as General ($221) + Research ($0) + Ownership ($0) = $221.
Last reported payment date: 2024-02-28 • Largest payer in this snapshot: ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) ($142).
Total Amount
$221
General + Research + Ownership
Payments
6
Total payment records
General Amount
$221
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-02-28
Latest reported date
Top Companies
Largest payers in this snapshot
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-03-17
PECOS data refreshed: 2026-06-15
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20200402002188 | I | Internal Medicine | VA | TBD |
| I20200924002906 | I | Critical Care (Intensivists) | CA | TBD |
| I20250317002593 | I | Internal Medicine | HI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 227 | 105 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 217 | 99 | $0 |
| 99291 | Critical care, first 30-74 minutes | 173 | 83 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 73 | 73 | $0 |
| 99238 | Hospital discharge day management, 30 minutes or less | 54 | 54 | $0 |
Insurance plans in this area (ZIP 93221)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| N E U R O S U R G E R Y | CA | |
| - | CA | |
| Internal Medicine | CA | |
| General Surgery | CA | |
| Nephrology, Internal Medicine | CA | |
| P S Y C H I A T R Y | CA | |
| Internal Medicine | TX | |
| Cardiovascular Disease (Cardiology), Internal Medicine | CA | |
| Critical Care (Intensivists), Pulmonary Disease | CA | |
| Cardiovascular Disease (Cardiology), Internal Medicine | CA |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.