Mary Welch, LCSW
NPI 1134570146 · Clinical Social Worker · Scottsdale, AZ
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Welch, LCSW is a Clinical Social Worker provider in Scottsdale, AZ (NPI 1134570146).
Provider details
- NPI number
- 1134570146
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 31310 (TX)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
327 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) |
|---|---|---|
| Psychiatric Diagnostic Evaluation90791 | 126 | $125 |
| Psychotherapy, 45 Minutes90834 | 88 | $76 |
| Psychotherapy, 30 Minutes90832 | 65 | $57 |
| Psychotherapy, 1 Hour90837 | 48 | $111 |
Typical Medicare-allowed amounts for these services range $57–$125 (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
Additional practice locations (1)
- 4215 Joe Ramsey Blvd EGreenville, TX 75401-7852Phone: (903) 259-9955
Registry dates
- Enumerated
- 2016-06-30
- Last updated
- 2022-09-22
- Certified
- 2022-09-22
Frequently asked questions
- What is Mary Welch's NPI number?
- Mary Welch's National Provider Identifier (NPI) is 1134570146, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Welch's specialty?
- Mary Welch is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Welch located?
- Mary Welch's practice location on file with NPPES is 13400 E Shea Blvd, Scottsdale, AZ 85259-5452.
- What is Mary Welch's phone number?
- The practice phone number listed in the NPPES registry for Mary Welch is (480) 301-8000.
- Does Mary Welch accept Medicare?
- Mary Welch is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Welch's NPI active?
- Yes — Mary Welch's NPI (1134570146) is active in the NPPES registry as of the last update on 2022-09-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.