Joan H Mass, MD - Medicare Internal Medicine in Saint Charles, MO

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Joan H Mass, MD is a medicare enrolled "Internal Medicine" physician in Saint Charles, Missouri. Her current practice location is 300 1st Capitol Dr, Saint Charles, Missouri. You can reach out to her office (for appointments etc.) via phone at (636) 947-5000.

Joan H Mass is licensed to practice in Missouri (license number R9A66) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1295708162.

Contact Information

Joan H Mass, MD
300 1st Capitol Dr,
Saint Charles, MO 63301-2844
(636) 947-5000
(314) 317-0606

Map and Direction




Physician's Profile

Full NameJoan H Mass
GenderFemale
SpecialityInternal Medicine
Location300 1st Capitol Dr, Saint Charles, Missouri
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1295708162
  • Provider Enumeration Date: 02/09/2006
  • Last Update Date: 05/04/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 0244252112
  • Enrollment ID: I20051227000010

Medical Identifiers

Medical identifiers for Joan H Mass such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1295708162NPI-NPPES
1295708162MedicaidIL
207941121MedicaidMO

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine R9A66 (Missouri)Primary
208M00000XHospitalist R9A66 (Missouri)Secondary

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. Joan H Mass allows following entities to bill medicare on her behalf.
Entity NameAdult Care Services, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1851343883
PECOS PAC ID: 0941251680
Enrollment ID: O20050210000002
Entity NameSoutheastern Physician Services Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1083835441
PECOS PAC ID: 0042307852
Enrollment ID: O20160809000235
Entity NameIpc Pac Healthcare Services Of Missouri Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1326497587
PECOS PAC ID: 4587950589
Enrollment ID: O20160830002898
Entity NameSt Charles Physician Services Llp
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1609317205
PECOS PAC ID: 5698052694
Enrollment ID: O20170428002056
Entity NameForest Physician Services, Llp
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548791676
PECOS PAC ID: 8325325202
Enrollment ID: O20170502000753

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. Joan H Mass 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
Joan H Mass, MD
12125 Woodcrest Executive Dr, Suite 220,
Saint Louis, MO 63141-5001

Ph: (314) 317-0600		Joan H Mass, MD
300 1st Capitol Dr,
Saint Charles, MO 63301-2844

Ph: (636) 947-5000

Reviews and Comments


Internal Medicine Doctors in Saint Charles, MO

Lawrence Stephen Tierney, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 400 1st Capitol Dr Ste 201, Saint Charles, MO 63301
Phone: 636-669-2332    
Syed A Khalid, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 300 1st Capitol Dr, Saint Charles, MO 63301
Phone: 636-647-5000    Fax: 636-947-5090
Dr. Stephen M Comens, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1551 Wall St, 4th Floor, Saint Charles, MO 63303
Phone: 636-669-2220    Fax: 636-669-2401
Dr. Shephali Himanshu Wulff, D.O
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 330 1st Capitol Dr Ste 260, Saint Charles, MO 63301
Phone: 636-925-0900    
Jerome E Thurman, M.D.,F.A.C.E.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 711 Veterans Memorial Pkwy Ste 200, Saint Charles, MO 63303
Phone: 636-669-2219    Fax: 636-669-2380
Michael O Johnson, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 300 1st Capitol Dr, Saint Charles, MO 63301
Phone: 636-947-5000    
Dr. Hari H Diwakaran, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 400 1st Capitol Dr Ste 201, Saint Charles, MO 63301
Phone: 636-669-2332    Fax: 636-669-2401

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).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.