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MICHAEL JOSEPH MAY M.D.
NPI 1649380874
Ophthalmology in Portland, OR

Active since August 30, 2006PECOS EnrolledAccepts Medicare Assignment
3600 N INTERSTATE AVE, PORTLAND, OR 97227(503) 331-6330 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Michael Joseph May M.d. NPPES

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

MICHAEL JOSEPH MAY M.D. (NPI 1649380874) is an individual ophthalmology provider in Portland, Oregon, licensed in Oregon (MD25495) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Ohio State University College Of Medicine (1994).

NPPES Registry Identity

NPI1649380874
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameMICHAEL JOSEPH MAYCredential: M.D.
Location Address3600 N INTERSTATE AVEPortland, OR 97227-1106
Mailing Address3600 N Interstate AvePortland, OR 97227-1106
Phone(503) 331-6330
Sole ProprietorYes
Medical School CMSOhio State University College Of MedicineGraduated 1994
Enumeration DateAugust 30, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1649380874 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
Licenses✔ Licensed in OR · MD25495✔ Licensed in WA · MD00044396
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
3600 N INTERSTATE AVE, Portland, OR 97227
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Michael Joseph May M.d. 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 ID244203156
PECOS Enrollment IDI20051130000962, I20100222000420
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.

Medicare Billing Reassignment

Medicare enrollment records show Michael May reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Kaiser Foundation Health Plan Of The Northwest
Same address
Oncology, Radiation
3620 N INTERSTATE AVE
Portland, OR 97227
  • Reassigned Medicare billing, Oregon and Washington enrollments
  • Also billed through NPI 1184786527 (Washington)
  • 3,207 clinicians in this Medicare group
NPI 1093043424 (503) 280-2931

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97227 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
$134.16 typical visit price
range $58.99 – $176.88
Typical copayment $33.54 (range $14.74 – $44.22)
Most-billed visit code 99204
Established Patient
$73.28 typical visit price
range $19.32 – $144.79
Typical copayment $18.32 (range $4.83 – $36.19)
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.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DAVID WEI KUO LIN M.D.
Otolaryngology
3600 N INTERSTATE AVE, INTERSTATE MEDICAL OFFICE CENTRAL
PORTLAND, OR 97227
Multnomah County (503) 331-6085
DR. LYNETTE SANTOS MALIK M.D.
Physical Medicine & Rehabilitation (Sports Medicine)
3600 N INTERSTATE AVE, DEPARTMENT OF PHYSICAL MEDICINE
PORTLAND, OR 97227
Multnomah County (503) 331-3070
DR. RYO A. SHOHARA M.D.
Internal Medicine (Hematology & Oncology)
3600 N INTERSTATE AVE
PORTLAND, OR 97227
Multnomah County (503) 331-6500
JOHANNA R HEYMANN RN, LCSW
Social Worker (Clinical)
3600 N INTERSTATE AVE
PORTLAND, OR 97227
Multnomah County (503) 213-8000
DR. SARI JOUIHAN MS, PHARMD
Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)
3600 N INTERSTATE AVE
PORTLAND, OR 97227
Multnomah County (503) 504-4203
THOMAS HUGH GIBBS O.D.
Optometrist
3600 N INTERSTATE AVE
PORTLAND, OR 97227
Multnomah County (503) 249-3449
DR. CATALINA HERNANDEZ TORRES MD
Internal Medicine (Hematology & Oncology)
3600 N INTERSTATE AVE
PORTLAND, OR 97227
Multnomah County (800) 813-2000
ANTONY MATHEW POOTHULLIL MD
Ophthalmology
3600 N INTERSTATE AVE
PORTLAND, OR 97227
Multnomah County (503) 331-6330

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 Michael May's NPI number?

The NPI number for Michael May is 1649380874. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Where is Michael May located?

Michael May practices at 3600 N Interstate Ave, Portland, OR 97227. The listed phone number is (503) 331-6330.

What is Michael May's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Michael May enrolled in Medicare?

Yes. Michael May 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.

Which organization bills Medicare for Michael May's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael May reassigns Medicare benefits to Kaiser Foundation Health Plan Of The Northwest (Portland, OR). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Michael May's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Michael May was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.