Dr William Penn Croom Iv, MD - Medicare Orthopedic Surgery in Lancaster, CA

Dr William Penn Croom Iv, MD is a medicare enrolled "Orthopaedic Surgery" physician in Lancaster, California. He went to Northwestern University Feinberg Medical School and graduated in 2012 and has 12 years of diverse experience with area of expertise as Orthopedic Surgery. He is a member of the group practice Southern California Permanente Medical Group and his current practice location is 615 W Avenue L, Lancaster, California. You can reach out to his office (for appointments etc.) via phone at (661) 951-4801.

Dr William Penn Croom Iv is licensed to practice in California (license number A127958) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1255752648.

Contact Information

Dr William Penn Croom Iv, MD
615 W Avenue L,
Lancaster, CA 93534-7211
(661) 951-4801
Not Available

Map and Direction




Physician's Profile

Full NameDr William Penn Croom Iv
GenderMale
SpecialityOrthopedic Surgery
Experience12 Years
Location615 W Avenue L, Lancaster, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr William Penn Croom Iv attended and graduated from Northwestern University Feinberg Medical School in 2012
  NPI Data:
  • NPI Number: 1255752648
  • Provider Enumeration Date: 01/02/2014
  • Last Update Date: 12/03/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 1254641871
  • Enrollment ID: I20181112002150

Medical Identifiers

Medical identifiers for Dr William Penn Croom Iv such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1255752648NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207XX0005XOrthopaedic Surgery - Sports Medicine A127958 (California)Secondary
207X00000XOrthopaedic Surgery A127958 (California)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Southern California Permanente Medical Group60027291758172

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr William Penn Croom Iv allows following entities to bill medicare on his behalf.
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770515280
PECOS PAC ID: 6002729175
Enrollment ID: O20031110000678

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr William Penn Croom Iv is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr William Penn Croom Iv, MD
615 W Avenue L,
Lancaster, CA 93534-7211

Ph: (661) 951-4801
Dr William Penn Croom Iv, MD
615 W Avenue L,
Lancaster, CA 93534-7211

Ph: (661) 951-4801

Reviews and Comments


Orthopaedic Surgery Doctors in Lancaster, CA

Dr. Gregory Tennant, D.O.
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 42135 10th St W Ste 101, Lancaster, CA 93534
Phone: 661-726-5005    Fax: 661-726-5377
Nitin A Shah, MD
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 44215 15th St W, Ste 110, Lancaster, CA 93534
Phone: 661-945-7802    Fax: 661-949-5872
Russell Odono, MD
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 615 W Avenue L, Lancaster, CA 93534
Phone: 661-729-7100    Fax: 661-951-2795
Mohamed Z. Lameer, M.D.
Orthopedic Surgery
Medicare: Medicare Enrolled
Practice Location: 43807 10th St W Ste C, Lancaster, CA 93534
Phone: 661-942-5400    Fax: 661-942-4782
Eric Toshio Owashi, M.D.
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 42135 10th St W Ste 101, Lancaster, CA 93534
Phone: 661-726-5005    
Dr. Alon Antebi, DO
Orthopedic Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 42135 10th St W, Suite 101, Lancaster, CA 93534
Phone: 661-726-5005    Fax: 661-726-5377

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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