HASSAN M ALISSA (MD) – Rheumatology Physician, NPI 1770522633
Rheumatology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
503 RHEUMATOLOGY in TX
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Provider Addresses for HASSAN M ALISSA (MD)
1340, Wonder World Drive, Mockingbird Hills, San Marcos, Hays County, Texas, 78666, United States
BLDG.2, SUITE 2203
SAN MARCOS, TX 786667598
Phone: (512) 667-7123
Fax: (512) 667-7328
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 96 Open Payments records for all available years, with a total value of $1,995.
Total Amount is formed as General ($1,995) + Research ($0) + Ownership ($0) = $1,995.
Last reported payment date: 2024-12-10 • Largest payer in this snapshot: ABBVIE INC. ($445).
Total Amount
$1,995
General + Research + Ownership
Payments
96
Total payment records
General Amount
$1,995
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-10
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $445 |
| Amgen Inc. | $297 |
| Lilly USA, LLC | $115 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $82 |
| PFIZER INC. | $75 |
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: 2008-10-06
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20081006000420 | I | Rheumatology | TX | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 1,078 | 446 | $0 |
| J3301 | Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 881 | 116 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 494 | 312 | $0 |
| 96372 | Injection of drug or substance under skin or into muscle | 187 | 93 | $0 |
| 96413 | Administration of chemotherapy into vein, 1 hour or less | 42 | 11 | $0 |
Insurance plans in this area (ZIP 78666)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| RHEUMATOLOGY | TX | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 172 | 22 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | TX | |
| R H E U M A T O L O G Y | TX | |
| Nurse Practitioner | TX |
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