DR. MICHAEL LLOYD MCMAHON II M.D.
NPI 1548240641
Internal Medicine in Nederland, TX

Q: What is Michael Mcmahon's NPI number?

The NPI number for Michael Mcmahon is 1548240641. It was assigned to this individual provider in the NPPES registry on January 17, 2006.

Q: What is Michael Mcmahon's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Michael Mcmahon was last updated on January 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.

Active since January 17, 2006PECOS EnrolledAccepts Medicare Assignment

1003 NEDERLAND AVE, NEDERLAND, TX 77627(409) 344-4466(409) 600-8525 Get Directions Write a Review

NPPES record last updated: January 6, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Michael Lloyd Mcmahon Ii M.d. NPPES

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

DR. MICHAEL LLOYD MCMAHON II M.D. (NPI 1548240641) is an individual internal medicine provider in Nederland, Texas, licensed in Texas (K0347) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Christus Southeast Texas- St Elizabeth, and is a graduate of University Of Texas Medical Branch At Galveston (1991).

NPPES Registry Identity

NPI1548240641

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. MICHAEL LLOYD MCMAHON IICredential: M.D.

Location Address1003 NEDERLAND AVENederland, TX 77627-2832

Mailing Address2940 Spurlock RdNederland, TX 77627-6313

Phone(409) 344-4466

Fax(409) 600-8525

Sole ProprietorYes

Medical School CMSUniversity Of Texas Medical Branch At GalvestonGraduated 1991

Enumeration DateJanuary 17, 2006

Last NPPES UpdateJanuary 6, 2021

NPPES CertifiedJanuary 6, 2021

✔ NPI 1548240641 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 · K0347

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 ListedPediatricsTaxonomy 208000000X · License K0347 (TX)

1003 NEDERLAND AVE, Nederland, TX 77627

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

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

Dr. Michael Lloyd Mcmahon Ii 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 ID941239578

PECOS Enrollment IDI20050808000536

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 Reassignments

Medicare enrollment records show Michael Mcmahon reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Southeast Texas Inpatient Physician Associates

2.9 mi

Hospitalist

2555 JIMMY JOHNSON BLVD
Port Arthur, TX 77640

Reassigned Medicare billing, Texas enrollment
4 clinicians in this Medicare group

NPI 1477986891 (409) 724-7389

Mid County Medical Group PA

3.0 mi

Internal Medicine

2501 JIMMY JOHNSON BLVD STE 110A
Port Arthur, TX 77640

Reassigned Medicare billing, Texas enrollment
9 clinicians in this Medicare group

NPI 1568470136 (409) 344-4466

Hni Physician Services Of Texas, Inc

233 mi

Internal Medicine

7500 RIALTO BLVD STE 1-140
Austin, TX 78735

Reassigned Medicare billing, Texas enrollment
80 clinicians in this Medicare group

NPI 1538729744 (512) 730-3056

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

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

2,204 services345 patients

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308

A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.

539 services120 patients

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

370 services187 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

263 services233 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

208 services106 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

198 services178 patients

Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more 99306

An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.

135 services121 patients

Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow G0181

This service involves a physician overseeing your care while you receive Medicare-covered services from a home health agency. The care you're receiving is complex and involves various disciplines. The physician isn't physically present but regularly supervises your treatment to ensure optimal health outcomes.

67 services42 patients

Hospital discharge day management, 30 minutes or less 99238

Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.

57 services48 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

16 services14 patients

Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310

A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.

15 services14 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

15 services15 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Christus Southeast Texas- St Elizabeth

Acute Care Hospitals · Beaumont, TX

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number450034

Location2830 Calder AvenueBeaumont, TX 77702 · Jefferson County

Emergency services Birthing friendly

Chi St Lukes Health Memorial Livingston

Acute Care Hospitals · Livingston, TX

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number450395

Location1717 Hwy 59 BypassLivingston, TX 77351 · Polk County

Emergency services Birthing friendly

Tyler County Hospital

Acute Care Hospitals · Woodville, TX

OwnershipGovernment - Hospital District or Authority

CMS Certification Number450460

Location1100 West BluffWoodville, TX 75979 · Tyler County

Emergency services

The Medical Center Of Southeast Texas

Acute Care Hospitals · Port Arthur, TX

3/5 CMS rating

OwnershipPhysician

CMS Certification Number450518

Location2555 Jimmy Johnson BlvdPort Arthur, TX 77640 · Jefferson County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77627 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

$124.88 typical visit price

range $54.04 – $164.93

Typical copayment $31.22 (range $13.51 – $41.23)

Most-billed visit code 99204

Established Patient

$95.83 typical visit price

range $17.17 – $134.47

Typical copayment $23.95 (range $4.29 – $33.61)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan

Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…

93%273 patients4/55-star benchmark: 100%

Health Information Exchange

The MIPS eligible clinician that transitions or refers their patient to another setting of care or health care clinician (1) uses CEHRT to create a summary of care record; and (2) electronically transmits such summary to a receiving health care clinician for…

4%175 patients1/55-star benchmark: 98%

Medication Reconciliation

The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.

81%1,523 patients4/55-star benchmark: 100%

Patient-Specific Education

The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.

80%1,045 patients4/55-star benchmark: 100%

Provide Patient Access

At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…

100%1,045 patients5/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 12

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Foam dressing, wound cover, sterile, pad size 16 sq. in. or less, with any size adhesive border, each dressing A6212

DME-Medical/Surgical Supplies · category DA023N

2 suppliers12 claims156 services$9.33 avg. paid by Medicare

Walker, folding, wheeled, adjustable or fixed height E0143

DME-Other DME · category DE000N

2 suppliers12 claims12 services$40.32 avg. paid by Medicare

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260

DME-Hospital Beds · category DB000N

3 suppliers23 claims23 services$40.23 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

3 suppliers16 claims18 services$14.91 avg. paid by Medicare

Continuous positive airway pressure (cpap) device E0601

DME-Other DME · category DE001N

1 supplier11 claims11 services$30.31 avg. paid by Medicare

Patient lift, hydraulic or mechanical, includes any seat, sling, strap(s) or pad(s) E0630

DME-Other DME · category DE000N

2 suppliers18 claims18 services$39.22 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 6

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

NEDERLAND AVE URGENT CARE AND FAMILY WELLNESS, LLC

Clinic/Center (Urgent Care)