Dr John M Loeb, MD - Medicare Internal Medicine in Walnut Creek, CA

Dr John M Loeb, MD is a medicare enrolled "Internal Medicine - Rheumatology" physician in Walnut Creek, California. His current practice location is 120 La Casa Via, Ste 204, Walnut Creek, California. You can reach out to his office (for appointments etc.) via phone at (925) 210-1050.

Dr John M Loeb is licensed to practice in California (license number G29097) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1932106390.

Contact Information

Dr John M Loeb, MD
120 La Casa Via, Ste 204,
Walnut Creek, CA 94598-3007
(925) 210-1050
(921) 210-1082



Physician's Profile

Full NameDr John M Loeb
GenderMale
SpecialityInternal Medicine - Rheumatology
Location120 La Casa Via, Walnut Creek, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1932106390
  • Provider Enumeration Date: 06/30/2005
  • Last Update Date: 07/28/2010
  Medicare PECOS Information:
  • PECOS PAC ID: 6507990181
  • Enrollment ID: I20100818000507

Medical Identifiers

Medical identifiers for Dr John M Loeb such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1932106390NPI-NPPES
00G290970MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RR0500XInternal Medicine - Rheumatology G29097 (California)Primary

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 John M Loeb allows following entities to bill medicare on his behalf.
Entity NameArthritis And Rheumatology Medical Associates Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1154403483
PECOS PAC ID: 1355329244
Enrollment ID: O20040708000413

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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 John M Loeb 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 John M Loeb, MD
120 La Casa Via, Ste 204,
Walnut Creek, CA 94598-3007

Ph: (925) 210-1050
Dr John M Loeb, MD
120 La Casa Via, Ste 204,
Walnut Creek, CA 94598-3007

Ph: (925) 210-1050

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Internal Medicine Doctors in Walnut Creek, CA

Dr. Joseph Patrick Henry, M.D.
Rheumatology
Medicare: May Accept Medicare Assignments
Practice Location: 1220 Rossmoor Pkwy, Walnut Creek, CA 94595
Phone: 925-947-3393    Fax: 925-947-3396
Mr. Ramin Khashayar, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 1399 Ygnacio Valley Rd, Ste 14, Walnut Creek, CA 94598
Phone: 925-939-3050    Fax: 925-939-3057
Dr. Hennessey Tseng, M.D.
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 1450 Treat Blvd, Suite 220b, Walnut Creek, CA 94597
Phone: 925-937-1770    Fax: 925-937-0630
Dr. Ali-reza Barmaki, M.D.
Rheumatology
Medicare: May Accept Medicare Assignments
Practice Location: 1220 Rossmoor Pkwy, Walnut Creek, CA 94595
Phone: 925-947-3393    Fax: 925-947-3396
Dr. Cynthia M. Mullen, M.D.
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 2637 Shadelands Dr, Walnut Creek, CA 94598
Phone: 925-322-2372    Fax: 925-322-6720
Mr. David Nathanson,
Rheumatology
Medicare: Medicare Enrolled
Practice Location: 320 Lennon Ln, Walnut Creek, CA 94598
Phone: 925-906-2000    
Mark D Nathan, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 106 La Casa Via, #140, Walnut Creek, CA 94598
Phone: 925-274-2860    Fax: 925-932-4527

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