Dr Daniel Ahn, DO - Medicare Ophthalmology in Sonoma, CA

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Dr Daniel Ahn, DO is a medicare enrolled "Ophthalmology" physician in Sonoma, California. He went to New York College Of Osteo Medicine Of New York Institute Of Technology and graduated in 2008 and has 17 years of diverse experience with area of expertise as Ophthalmology. He is a member of the group practice Horizon Medical Group Pc and his current practice location is 181 Andrieux St, Suite 100, Sonoma, California. You can reach out to his office (for appointments etc.) via phone at (707) 588-7939.

Dr Daniel Ahn is licensed to practice in California (license number 20A12253) 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 1932416781.

Contact Information

Dr Daniel Ahn, DO
181 Andrieux St, Suite 100,
Sonoma, CA 95476-6932
(707) 588-7939
(707) 588-7941

Map and Direction




Physician's Profile

Full NameDr Daniel Ahn
GenderMale
SpecialityOphthalmology
Experience17 Years
Location181 Andrieux St, Sonoma, 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 Daniel Ahn attended and graduated from New York College Of Osteo Medicine Of New York Institute Of Technology in 2008
  NPI Data:
  • NPI Number: 1932416781
  • Provider Enumeration Date: 08/31/2010
  • Last Update Date: 07/31/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 6406010990
  • Enrollment ID: I20160617001599

Medical Identifiers

Medical identifiers for Dr Daniel Ahn such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1932416781NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207W00000XOphthalmology OT012630 (Pennsylvania)Secondary
207W00000XOphthalmology 20A12253 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Luke's Cornwall HospitalNewburgh, NYHospital
Garnet Health Medical CenterMiddletown, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Horizon Medical Group Pc610371552962

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 Daniel Ahn allows following entities to bill medicare on his behalf.
Entity NameHorizon Medical Group Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1063488179
PECOS PAC ID: 6103715529
Enrollment ID: O20040313000206
Entity NameEastern Orange Ambulatory Surgery Center, Llc
Entity TypePart B Supplier - Ambulatory Surgical Center
Entity IdentifiersNPI Number: 1568583896
PECOS PAC ID: 5799866570
Enrollment ID: O20080117000723

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 Daniel Ahn 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 Daniel Ahn, DO
181 Andrieux St, Suite 100,
Sonoma, CA 95476-6932

Ph: (707) 588-7939		Dr Daniel Ahn, DO
181 Andrieux St, Suite 100,
Sonoma, CA 95476-6932

Ph: (707) 588-7939

Reviews and Comments


Ophthalmology Doctors in Sonoma, CA

Dr. Michael Saidel, MD
Ophthalmology
Medicare: Accepting Medicare Assignments
Practice Location: 181 Andrieux St Ste 100, Sonoma, CA 95476
Phone: 707-996-1052    Fax: 707-996-6787
Dr. Mark Leonard Schluter, M.D.
Ophthalmology
Medicare: Not Enrolled in Medicare
Practice Location: 696 3rd St W, Sonoma, CA 95476
Phone: 707-996-1900    Fax: 707-996-4396
Dr. Thomas Michael Dixon, MD
Ophthalmology
Medicare: Not Enrolled in Medicare
Practice Location: 181 Andrieux, Suite 100, Sonoma, CA 95476
Phone: 707-996-1622    Fax: 707-996-4000

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.