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JAN M MERIN MD
NPI 1225031321
Internal Medicine in Houston, TX

Active since May 23, 2005PECOS Enrolled
1330 WIRT RD STE R, HOUSTON, TX 77055(346) 406-1730(346) 388-1414 Get Directions Write a Review

NPPES record last updated: May 29, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 29, 2023, Jul 2, 2021 (2 updates tracked since 2021).

About Jan M Merin Md NPPES

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

JAN M MERIN MD (NPI 1225031321) is an individual internal medicine provider in Houston, Texas, licensed in Texas (S9035) and active in the NPI registry since May 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1225031321
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameJAN M MERINCredential: MD
Location Address1330 WIRT RD STE RHouston, TX 77055-4901
Mailing Address1330 Wirt Rd Ste RHouston, TX 77055-4901 · (346) 406-1730
Phone(346) 406-1730
Fax(346) 388-1414
Sole ProprietorNo
Enumeration DateMay 23, 2005
Last NPPES UpdateMay 29, 20232 updates tracked since enumeration
NPPES CertifiedMay 29, 2023
✔ NPI 1225031321 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in TX · S9035
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Medical OncologyTaxonomy 207RX0202X · License 92-304 (NM)
1330 WIRT RD STE R, Houston, TX 77055
Open in Google Maps ↗

Other Identifiers 2

Medicaid14065NM
Other900521294NM · Medicare Group

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Jan M Merin Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Jan Merin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Kdunn And Associates, P.A.
Same address
Internal Medicine
1330 WIRT RD STE R
Houston, TX 77055
  • Reassigned Medicare billing, Texas enrollment
  • 6 clinicians in this Medicare group
NPI 1073912226 (346) 406-1730

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 77055 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
$134.06 typical visit price
range $58.24 – $176.98
Typical copayment $33.51 (range $14.56 – $44.24)
Most-billed visit code 99204
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
Most-billed visit code 99214
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

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

KDUNN AND ASSOCIATES, P.A.
Internal Medicine
1330 WIRT RD STE R
HOUSTON, TX 77055
Harris County (346) 406-1730

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 Jan Merin's NPI number?

The NPI number for Jan Merin is 1225031321. It was assigned to this individual provider in the NPPES registry on May 23, 2005.

Where is Jan Merin located?

Jan Merin practices at 1330 Wirt Rd Ste R, Houston, TX 77055. The listed phone number is (346) 406-1730.

What is Jan Merin's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Jan Merin enrolled in Medicare?

Yes. Jan Merin is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Jan Merin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jan Merin reassigns Medicare benefits to Kdunn And Associates, P.A. (Houston, TX). 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 Jan Merin'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 Jan Merin was last updated on May 29, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.