1. Home
  2. Directory
  3. Pennsylvania
  4. Breinigsville
  5. Social Worker
  6. NPI Profile

HOLLY ANN MULLEN MSW, LSW
NPI 1144617523
Social Worker - Clinical in Breinigsville, PA

Active since April 23, 2015PECOS EnrolledAccepts Medicare Assignment
9636 CRESCENT LN # 2, BREINIGSVILLE, PA 18031(484) 866-7218(484) 866-7218 Get Directions Write a Review

NPPES record last updated: April 16, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 9, 2025, Jun 9, 2023 (2 updates tracked since 2023).

About Holly Ann Mullen Msw, Lsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

HOLLY ANN MULLEN MSW, LSW (NPI 1144617523) is an individual clinical provider in Breinigsville, Pennsylvania, licensed in Pennsylvania (CW019120) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS, is affiliated with Lehigh Valley Hospital, and maintains a secondary practice location in Allentown.

NPPES Registry Identity

NPI1144617523
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameHOLLY ANN MULLENCredential: MSW, LSW
Location Address9636 CRESCENT LN # 2Breinigsville, PA 18031-1830
Mailing Address9636 Crescent Lane, 2Allentown, PA 18103 · (484) 866-7218
Phone(484) 866-7218
Fax(484) 866-7218
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateApril 23, 2015
Last NPPES UpdateApril 16, 20252 updates tracked since enumeration
NPPES CertifiedApril 9, 2025
✔ NPI 1144617523 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in PA · CW019120
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
Also ListedCounselorTaxonomy 101Y00000X · License SW130601 (PA)
9636 CRESCENT LN # 2, Breinigsville, PA 18031
Open in Google Maps ↗

Other Names 1

Former Name (1)Holly Delgrosso

Secondary Practice Location 1

Location 11240 S Cedar Crest Blvd Ste 410Allentown, PA 18103-6218 · Phone (610) 402-7884 · Fax (610) 402-8876

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Holly Ann Mullen Msw, Lsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8022455781
PECOS Enrollment IDI20240318002661
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 45 minutes 90834
Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.
31 services13 patients
Psychotherapy, 45 minutes 90834
Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.
28 services12 patients
Psychiatric diagnostic evaluation 90791
A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.
17 services16 patients
Psychiatric diagnostic evaluation 90791
A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.
14 services14 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Lehigh Valley Hospital

Acute Care Hospitals · Allentown, PA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390133
Location1200 South Cedar Crest BoulevardAllentown, PA 18103 · Lehigh County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 18031 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $54.64 – $166.87
Typical copayment $0.00 (range $13.66 – $41.71)
Most-billed visit code NA
Established Patient
$68.36 typical visit price
range $17.33 – $135.84
Typical copayment $17.09 (range $4.33 – $33.96)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Holly Mullen's NPI number?

The NPI number for Holly Mullen is 1144617523. It was assigned to this individual provider in the NPPES registry on April 23, 2015. The provider is also known as Holly Delgrosso.

Where is Holly Mullen located?

Holly Mullen practices at 9636 Crescent Ln # 2, Breinigsville, PA 18031. The listed phone number is (484) 866-7218.

What is Holly Mullen's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Holly Mullen enrolled in Medicare?

Yes. Holly Mullen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Holly Mullen accept?

Health plans from Providence Health Plan list Holly Mullen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Holly Mullen affiliated with any hospitals?

According to CMS data, Holly Mullen is affiliated with Lehigh Valley Hospital.

When was this NPI record last updated?

The NPPES record for Holly Mullen was last updated on April 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.