Theresa Hallenen, OT
NPI 1811263502 · Occupational Therapist · Waldorf, MD
Enrolled with Medicare as Practitioner - Occupational Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Theresa Hallenen, OT is a Occupational Therapist provider in Waldorf, MD (NPI 1811263502).
Provider details
- NPI number
- 1811263502
- Entity type
- Individual
- Primary specialty
- Occupational TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Credential
- OT
- Sex
- Female
- Sole proprietor
- No
- License
- 06359 (MD)
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
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
101 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 Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 56 | $22 |
| Therapy Procedure Using Functional Activities97530 | 33 | $25 |
| Evaluation for Occupational Therapy, Typically 45 Minutes97166 | 12 | $95 |
Typical Medicare-allowed amounts for these services range $22–$95 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-03-27
- Last updated
- 2012-03-27
Frequently asked questions
- What is Theresa Hallenen's NPI number?
- Theresa Hallenen's National Provider Identifier (NPI) is 1811263502, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theresa Hallenen's specialty?
- Theresa Hallenen is listed in the NPPES registry with a primary specialty of Occupational Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Theresa Hallenen located?
- Theresa Hallenen's practice location on file with NPPES is 3 Post Office Rd, Waldorf, MD 20602-2756.
- What is Theresa Hallenen's phone number?
- The practice phone number listed in the NPPES registry for Theresa Hallenen is (301) 540-6140.
- Does Theresa Hallenen accept Medicare?
- Theresa Hallenen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Theresa Hallenen's NPI active?
- Yes — Theresa Hallenen's NPI (1811263502) is active in the NPPES registry as of the last update on 2012-03-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.