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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARK CHRISTIAN HAMMANN
NPI 1255281291
Counselor in Tucson, AZ

Active since January 30, 2026
101 W IRVINGTON RD STE 10, TUCSON, AZ 85714(520) 670-3909(520) 309-2560 Get Directions Write a Review

NPPES record last updated: October 5, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

Record update history: Oct 5, 2026, Oct 3, 2026, Jan 30, 2026 (3 updates tracked since 2026).

About Mark Christian Hammann NPPES

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

MARK CHRISTIAN HAMMANN (NPI 1255281291) is an individual counselor in Tucson, Arizona, licensed in Arizona (LAC-24288) and active in the NPI registry since January 2026. He maintains a secondary practice location in Tucson.

NPPES Registry Identity

NPI1255281291
Entity TypeIndividualMale
Primary Taxonomy101Y00000X
Provider Legal NameMARK CHRISTIAN HAMMANN
Location Address101 W IRVINGTON RD STE 10Tucson, AZ 85714-3050
Mailing Address839 W Congress StTucson, AZ 85745-2819 · (520) 670-3909 · Fax (520) 309-2560
Phone(520) 670-3909
Fax(520) 309-2560
Sole ProprietorNo
Enumeration DateJanuary 30, 2026
Last NPPES UpdateOctober 5, 20263 updates tracked since enumeration
NPPES CertifiedOctober 5, 2026
✔ NPI 1255281291 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselorBehavioral Health & Social Service Providers
Taxonomy Code101Y00000X
Licenses✔ Licensed in AZ · LAC-24288✔ Licensed in AZ · LAC-08387T
Definition
A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.
101 W IRVINGTON RD STE 10, Tucson, AZ 85714
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Secondary Practice Location 1

Location 12913 E 22nd StTucson, AZ 85713-2001 · Phone (520) 303-1697

Other Providers at the Same Location NPPES

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

KELLY ROTHERMAL NP
Nurse Practitioner (Family)
101 W IRVINGTON RD STE 10
TUCSON, AZ 85714
Pima County (520) 670-3909

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 Mark Hammann's NPI number?

The NPI number for Mark Hammann is 1255281291. It was assigned to this individual provider in the NPPES registry on January 30, 2026.

Where is Mark Hammann located?

Mark Hammann practices at 101 W Irvington Rd Ste 10, Tucson, AZ 85714. The listed phone number is (520) 670-3909.

What is Mark Hammann's specialty?

The primary specialty registered for this NPI is Counselor with taxonomy code 101Y00000X.

When was this NPI record last updated?

The NPPES record for Mark Hammann was last updated on October 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days 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.