Quick answers
- Does Gregory H. Portland accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory H. Portland accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Gregory H. Portland see?
- In 2024, CMS data shows 980 Original Medicare patients and 8,777 services for Gregory H. Portland. This counts Original Medicare only and measures volume, not quality.
- What is Gregory H. Portland's NPI number?
- 1265487508. 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 Gregory H. Portland, 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 patients | 980 |
|---|---|
| Services billed to Medicare | 8,777 |
| Different services or procedures | 81 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)2,387 services
- Aspiration and/or injection of fluid from large joint (20610)879 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)459 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)365 services
- Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose (J7323)364 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 cholesterol75%
- Arthritis74%
- High blood pressure59%
- Osteoporosis23%
- Ischemic heart disease21%
- Anxiety20%
Hospitals where Gregory H. Portland works
Medicare's Facility Affiliation Data lists Gregory H. Portland 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.
- Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140010
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140130
Practice locations
Addresses where Gregory H. Portland is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 17; the Medicare profile lists all.
- 2101 Waukegan RdBannockburn, IL 60015
- 2401 Ravine WayGlenview, IL 60025
- 2600 Compass RdGlenview, IL 60026
- 2923 N California, Suite 100Chicago, IL 60618 (773) 249‑3100
- 2923 N California Ave, Suite 301Chicago, IL 60618 (773) 327‑5639
Group practices
Medicare enrollment lists Gregory H. Portland as a member of these groups (CMS data updated October 2, 2026).
- Select Rehabilitation, LLC2,046 clinicians in the group
- Illinois Bone and Joint Institute, LLC604 clinicians in the group
Specialties
- Sports Medicineprimary
- Orthopedic Surgeryalso
Other sports medicine doctors in Bannockburn
Clinicians with the same Medicare primary specialty in Bannockburn, IL — not a recommendation.
Other clinicians in Select Rehabilitation, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265487508 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians