Holly Mullen, MSW, LSW
NPI 1144617523 · Clinical Social Worker · Breinigsville, PA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holly Mullen, MSW, LSW is a Clinical Social Worker provider in Breinigsville, PA (NPI 1144617523).
Provider details
- NPI number
- 1144617523
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- MSW, LSW
- Sex
- Female
- Sole proprietor
- No
- License
- SW130601 (PA)
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
11 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
90 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) |
|---|---|---|
| Psychotherapy, 45 Minutes90834 | 31 | $73 |
| Psychotherapy, 45 Minutes90834 | 28 | $64 |
| Psychiatric Diagnostic Evaluation90791 | 17 | $101 |
| Psychiatric Diagnostic Evaluation90791 | 14 | $108 |
Typical Medicare-allowed amounts for these services range $64–$108 (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)
- 1240 S Cedar Crest Blvd Ste 410Allentown, PA 18103-6218Phone: (610) 402-7884Fax: (610) 402-8876
Registry dates
- Enumerated
- 2015-04-23
- Last updated
- 2025-04-16
- Certified
- 2025-04-09
Frequently asked questions
- What is Holly Mullen's NPI number?
- Holly Mullen's National Provider Identifier (NPI) is 1144617523, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holly Mullen's specialty?
- Holly Mullen is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Holly Mullen located?
- Holly Mullen's practice location on file with NPPES is 9636 Crescent Ln # 2, Breinigsville, PA 18031-1830.
- What is Holly Mullen's phone number?
- The practice phone number listed in the NPPES registry for Holly Mullen is (484) 866-7218.
- Does Holly Mullen accept Medicare?
- Holly Mullen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holly Mullen's NPI active?
- Yes — Holly Mullen's NPI (1144617523) is active in the NPPES registry as of the last update on 2025-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.