Melissa Mackay, OT R/L
NPI 1790438679 · Occupational Therapist · Montclair, CA
Enrolled with Medicare as Practitioner - Occupational Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Mackay, OT R/L is a Occupational Therapist provider in Montclair, CA (NPI 1790438679).
Provider details
- NPI number
- 1790438679
- Entity type
- Individual
- Primary specialty
- Occupational TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Credential
- OT R/L
- 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
4 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
624 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 to Re-Educate Brain-To-Nerve-To-Muscle Function, Each 15 Minutes97112 | 197 | $26 |
| Therapy Procedure Using Functional Activities97530 | 184 | $35 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 119 | $23 |
| Therapy Procedure Using Manual Technique, Each 15 Minutes97140 | 99 | $21 |
| Electrical Stimulation (unattended), to One Or More Areas for Indication(s) Other Than Wound Care, As Part of a Therapy Plan of CareG0283 | 25 | $9 |
Typical Medicare-allowed amounts for these services range $9–$35 (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
- 2022-01-31
- Last updated
- 2022-01-31
- Certified
- 2022-01-31
Frequently asked questions
- What is Melissa Mackay's NPI number?
- Melissa Mackay's National Provider Identifier (NPI) is 1790438679, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Mackay's specialty?
- Melissa Mackay is listed in the NPPES registry with a primary specialty of Occupational Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Melissa Mackay located?
- Melissa Mackay's practice location on file with NPPES is 5350 Olive St, Montclair, CA 91763-1639.
- What is Melissa Mackay's phone number?
- The practice phone number listed in the NPPES registry for Melissa Mackay is (909) 295-5900.
- Does Melissa Mackay accept Medicare?
- Melissa Mackay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Mackay's NPI active?
- Yes — Melissa Mackay's NPI (1790438679) is active in the NPPES registry as of the last update on 2022-01-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.