Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John R Markham PC

Q: What type of organization is John R Markham PC?

John R Markham PC is registered in NPPES as a Optometrist (its primary provider taxonomy).

Optometrist in Prescott, AZ · enumerated 2007 · authorized official John Markham, Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1689871667

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name John R Markham PC

Other name <Unavail>

Practice address 1680 Willow Creek Rd, Prescott, AZ, 86301

Phone (928) 778-3950

Fax (928) 778-3999

Enumeration date Jul 2, 2007

Last updated in NPPES Apr 1, 2016

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License 142 (AZ) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 1885 (AZ) Primary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name John Markham

Title Owner

Phone (928) 778-3950

Other identifiers

Identifier	Type	State	Issuer
3421045	Other	AZ	CIGNA
7442967	Other	AZ	AETNA
DM2NNP	Other	-	ARIZONA FOUNDATION
NNP12599	Other	AZ	UNIVERSAL HEALTH CARE
033176-001	Other	AZ	MERCYCARE
866291-9714	Other	-	HUMANA
033176	Other	AZ	AHCCCS
190721	Other	-	AHCCCS
3Z0277	Other	AZ	HEALTH NET
AZ0142	Other	-	EYECARE DIRECT
1263119	Other	AZ	MERCYCARE
190721	Medicaid	AZ	-
5858351	Other	-	AETNA
033176	Medicaid	AZ	-
153165	Other	AZ	RAN-AMN
63119	Other	-	MEDICARE - UNSPECIFIED
15220	Other	-	AVESIS
A00148	Other	AZ	EYEMED
AZ01170	Other	-	MEDICARE SUBMITTER ID - CLINIC
AZ0142	Other	-	EYEMED

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is John R Markham PC?

John R Markham PC is registered in NPPES as a Optometrist (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-01.