Diana Diem
NPI 1003520917 · Occupational Therapist · Selden, NY
Enrolled with Medicare as Practitioner - Occupational Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Diem is a Occupational Therapist provider in Selden, NY (NPI 1003520917).
Provider details
- NPI number
- 1003520917
- Entity type
- Individual
- Primary specialty
- Occupational TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
3 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,483 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Therapy Procedure Using Functional Activities97530 | 581 | $40 |
| Therapy Procedure to Re-Educate Brain-To-Nerve-To-Muscle Function, Each 15 Minutes97112 | 554 | $28 |
| Therapy Procedure Using Manual Technique, Each 15 Minutes97140 | 545 | $23 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 498 | $25 |
| Therapy Procedure in a Group Setting97150 | 163 | $15 |
| Application of Whirlpool Therapy97022 | 50 | $13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-01-06
- Last updated
- 2023-10-20
- Certified
- 2023-10-20
Frequently asked questions
- What is Diana Diem's NPI number?
- Diana Diem's National Provider Identifier (NPI) is 1003520917, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Diem's specialty?
- Diana Diem is listed in the NPPES registry with a primary specialty of Occupational Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Diana Diem located?
- Diana Diem's practice location on file with NPPES is 764 Middle Country Rd, Selden, NY 11784-2503.
- What is Diana Diem's phone number?
- The practice phone number listed in the NPPES registry for Diana Diem is (631) 760-7800.
- Does Diana Diem accept Medicare?
- Diana Diem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Diem's NPI active?
- Yes — Diana Diem's NPI (1003520917) is active in the NPPES registry as of the last update on 2023-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.