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MIKAEL GUZMAN KARLSSON MD, PHD
NPI 1366939126
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology in Houston, TX

Active since April 17, 2018PECOS Enrolled
6701 FANNIN ST STE 950, HOUSTON, TX 77030(832) 822-5046(832) 825-3504 Get Directions Write a Review

NPPES record last updated: August 5, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 5, 2026, Apr 17, 2018 (2 updates tracked since 2018).

About Mikael Guzman Karlsson Md, Phd NPPES

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

MIKAEL GUZMAN KARLSSON MD, PHD (NPI 1366939126) is an individual neurology with special qualifications in child neurology provider in Houston, Texas, licensed in Texas (V3011) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS, maintains a secondary practice location in Houston, and is a graduate of University Of Alabama School Of Medicine (2018).

NPPES Registry Identity

NPI1366939126
Entity TypeIndividualMale
Primary Taxonomy2084N0402X
Provider Legal NameMIKAEL GUZMAN KARLSSONCredential: MD, PHD
Location Address6701 FANNIN ST STE 950Houston, TX 77030-2611
Mailing Address6701 Fannin St Ste 950Houston, TX 77030-2611 · (832) 822-5046 · Fax (832) 825-3504
Phone(832) 822-5046
Fax(832) 825-3504
Sole ProprietorNo
Medical School CMSUniversity Of Alabama School Of MedicineGraduated 2018
Enumeration DateApril 17, 2018
Last NPPES UpdateAugust 5, 20262 updates tracked since enumeration
NPPES CertifiedAugust 5, 2026
✔ NPI 1366939126 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPsychiatry & Neurology · Neurology with Special Qualifications in Child NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0402X
License✔ Licensed in TX · V3011
Definition
A Child Neurologist specializes in neurology with special skills in diagnosis and treatment of neurologic disorders of the neonatal period, infancy, early childhood, and adolescence.
Also ListedPreventive Medicine · Clinical InformaticsTaxonomy 2083C0008X · License V3011 (TX)
Also ListedPsychiatry & Neurology · Neurodevelopmental DisabilitiesTaxonomy 2084P0005X · License V3011 (TX)
6701 FANNIN ST STE 950, Houston, TX 77030
Open in Google Maps ↗

Secondary Practice Location 1

Location 16621 Fannin StHouston, TX 77030-2399 · Phone (832) 824-1000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mikael Guzman Karlsson Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6305303157
PECOS Enrollment IDI20260811004845
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 Mikael Guzman Karlsson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Texas Children's Physician Group
0.1 mi
Pediatrics
6621 FANNIN ST
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Texas Childrens Physician Group
  • 2,498 clinicians in this Medicare group
NPI 1861675506 (832) 824-1000

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 77030 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 3

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

GABRIELLE BLUDAU MSN, APRN, CPNP-AC
Nurse Practitioner (Pediatrics)
6701 FANNIN ST STE 950
HOUSTON, TX 77030
Harris County (832) 822-5046
FATEMA MALBARI MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
6701 FANNIN ST STE 950
HOUSTON, TX 77030
Harris County (832) 824-1000
KIMBERLY M HOUCK M.D.
Psychiatry & Neurology (Epilepsy)
6701 FANNIN ST STE 950
HOUSTON, TX 77030
Harris County (832) 822-5046

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 Mikael Guzman Karlsson's NPI number?

The NPI number for Mikael Guzman Karlsson is 1366939126. It was assigned to this individual provider in the NPPES registry on April 17, 2018.

Where is Mikael Guzman Karlsson located?

Mikael Guzman Karlsson practices at 6701 Fannin St Ste 950, Houston, TX 77030. The listed phone number is (832) 822-5046.

What is Mikael Guzman Karlsson's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology with Special Qualifications in Child Neurology, with taxonomy code 2084N0402X.

Is Mikael Guzman Karlsson enrolled in Medicare?

Yes. Mikael Guzman Karlsson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mikael Guzman Karlsson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mikael Guzman Karlsson reassigns Medicare benefits to Texas Children's Physician Group (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 Mikael Guzman Karlsson'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 Mikael Guzman Karlsson was last updated on August 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.