Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Kathryn Ferry Ziegler , MD

Internal Medicine โ€ข Spring, TX

Active NPI 1114111408 Individual Practitioner Female Practitioner Accepts Medicare assignment Telehealth (some services)
Practice location in NPPES

2255 E Mossy Oaks Rd, Ste 680
Spring, TX 773891812

Call 2815370300 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

2255 E Mossy Oaks Rd
Ste 680

Spring, TX 773891812

Telephone 2815370300
Fax 2815370315
Organization at the Same NPPES Address or Phone
Cypress Physicians Association Facility NPI 1295919223

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Cypress Physicians Association. See the list

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Medical School

Baylor College Of Medicine

Graduation Year

2003

Medicare patients

305 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider, 2024.

Medicare-allowed amount

About $184,782 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Paid by Medicare

About $134,904 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

30-day fills

10,467 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$427,337 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers โ€“ by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $1,115.18 across 56 records.

By nature of payment

  • Food and Beverage: $1,115.18 across 56 records.

Reporting-company totals (3 largest of 17)

  • Novo Nordisk Inc: $320.31 across 17 records.
  • Eli Lilly and Company: $160.43 across 3 records.
  • Amgen Inc.: $154.87 across 13 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

23 years (graduated 2003)

CMS Doctors and Clinicians data list 2003 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.

NPI first issued

2007

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

Telehealth (some services)

Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.

What this does not show: Telehealth (some services)

It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Ziegler has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Ziegler as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Spring and Texas

Billing and prescribing volume is not a quality rating.

Medicare Part B services

More Medicare Part B services than 80% of clinicians listed under Internal Medicine in Spring, TX (2024, 23 clinicians with data). Median for this group: 949. Middle half: 778 to 1,757.

More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Texas (2024, 5,420 clinicians with data). Median for this group: 644. Middle half: 277 to 1,324.

Medicare-allowed amount

A higher Medicare-allowed amount than 80% of clinicians listed under Internal Medicine in Spring, TX (2024, 23 clinicians with data). Median for this group: $75,258. Middle half: $58,823 to $139,621.

A higher Medicare-allowed amount than 85% of clinicians listed under Internal Medicine in Texas (2024, 5,420 clinicians with data). Median for this group: $61,173. Middle half: $27,477 to $116,014.

Paid by Medicare

A higher Medicare payment amount than 75% of clinicians listed under Internal Medicine in Spring, TX (2024, 23 clinicians with data). Median for this group: $57,222. Middle half: $46,589 to $107,582.

A higher Medicare payment amount than 85% of clinicians listed under Internal Medicine in Texas (2024, 5,420 clinicians with data). Median for this group: $47,441. Middle half: $20,511 to $90,151.

Medicare Part D prescriptions

More Part D prescriptions than 75% of clinicians listed under Internal Medicine in Spring, TX (2024, 27 clinicians with data). Median for this group: 2,370. Middle half: 333 to 3,975.

More Part D prescriptions than 70% of clinicians listed under Internal Medicine in Texas (2024, 5,692 clinicians with data). Median for this group: 815. Middle half: 119 to 4,814.

Part D drug cost

A higher Part D drug cost than 75% of clinicians listed under Internal Medicine in Spring, TX (2024, 27 clinicians with data). Median for this group: $193,737. Middle half: $11,941 to $422,836.

A higher Part D drug cost than 70% of clinicians listed under Internal Medicine in Texas (2024, 5,692 clinicians with data). Median for this group: $62,823. Middle half: $3,924 to $436,115.

36 active clinicians are listed under Internal Medicine with a practice address in Spring, TX (9,244 in Texas).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Spring

30.6% of these 36 clinicians have the CMS telehealth indicator.

72.2% of these 36 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo ยท Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments ยท Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 โ€“ December 31, 2025): 56 records totaling $1,115.18.

Manufacturer Payment Nature Product Type Amount ($)
Eli Lilly and Company
Food and Beverage
Cash or cash equivalent
ZEPBOUND General $124.89
Novo Nordisk Inc
Food and Beverage
In-kind items and services
Ozempic General $108.40
Corcept Therapeutics
Food and Beverage
In-kind items and services
Korlym General $80.80
Pfizer Inc.
Food and Beverage
In-kind items and services
PREVNAR 20 General $27.62
Novo Nordisk Inc
Food and Beverage
In-kind items and services
โ€” General $24.88
Pfizer Inc.
Food and Beverage
In-kind items and services
PREVNAR 20 General $24.85
Corcept Therapeutics
Food and Beverage
In-kind items and services
Korlym General $23.75
Pfizer Inc.
Food and Beverage
In-kind items and services
ELIQUIS General $22.42
Novo Nordisk Inc
Food and Beverage
In-kind items and services
Wegovy General $21.43
Sanofi Pasteur Inc.
Food and Beverage
In-kind items and services
FLUBLOK QUADRIVALENT NORTHERN HEMISPHERE General $21.35
Dexcom, Inc.
Food and Beverage
In-kind items and services
Dexcom G6 Transmitter General $21.22
Sumitomo Pharma America, Inc.
Food and Beverage
In-kind items and services
GEMTESA General $20.44
Eli Lilly and Company
Food and Beverage
In-kind items and services
JARDIANCE General $20.01
Amgen Inc.
Food and Beverage
In-kind items and services
OTEZLA General $19.98
Seqirus USA Inc
Food and Beverage
In-kind items and services
Flucelvax General $19.66
Bayer Healthcare Pharmaceuticals Inc.
Food and Beverage
In-kind items and services
Kerendia General $19.52
Boehringer Ingelheim Pharmaceuticals, Inc.
Food and Beverage
In-kind items and services
JARDIANCE General $19.38
Novo Nordisk Inc
Food and Beverage
In-kind items and services
โ€” General $19.08
Salix Pharmaceuticals, a division of Bausch Health US, LLC
Food and Beverage
In-kind items and services
XIFAXAN General $18.70
Amgen Inc.
Food and Beverage
In-kind items and services
EVENITY General $18.69
AstraZeneca Pharmaceuticals LP
Food and Beverage
In-kind items and services
AIRSUPRA General $18.52
Amgen Inc.
Food and Beverage
In-kind items and services
OTEZLA General $18.50
Amgen Inc.
Food and Beverage
In-kind items and services
OTEZLA General $18.42
AstraZeneca Pharmaceuticals LP
Food and Beverage
In-kind items and services
AIRSUPRA General $18.31
Sumitomo Pharma America, Inc.
Food and Beverage
In-kind items and services
GEMTESA General $17.81

(top 25 shown)

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B ยท Data Year 2024
Reporting Year:

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ€“2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ€“ by Provider and Service data, 2017โ€“2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
623 266 $249.03 $126.33
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
490 217 $50.00 $16.32
99439 Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month
393 41 $91.77 $48.10
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month
387 45 $122.00 $62.79
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
147 101 $348.32 $181.46
G0444 Annual depression screening, 5 to 15 minutes
133 133 $39.76 $18.44
99489 Complex chronic care management services for two or more chronic conditions, each additional 60 minutes of clinical staff time directed by health care professional, per calendar month
76 21 $137.00 $72.52
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
57 57 $249.21 $127.94
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
42 36 $176.00 $86.43
99487 Complex chronic care management services for two or more chronic conditions, first 60 minutes of clinical staff time directed by health care professional, per calendar month
35 21 $258.00 $134.52
81003 Automated urinalysis test
33 27 $15.00 $2.13
93000 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
32 31 $28.00 $14.46
87811 Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19)
26 25 $67.08 $38.47
99496 Transitional care management services for problem of high complexity
11 11 $539.00 $279.63

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D ยท Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Rosuvastatin Calcium Rosuvastatin Calcium 346 29,234 $6,210.84 109
Atorvastatin Calcium Atorvastatin Calcium 285 24,514 $2,998.63 95
Amlodipine Besylate Amlodipine Besylate 221 17,702 $1,578.15 78
Levothyroxine Sodium Levothyroxine Sodium 219 18,600 $1,924.23 74
Ezetimibe Ezetimibe 162 13,663 $4,591.19 67
Losartan Potassium Losartan Potassium 134 11,370 $1,263.41 48
Gabapentin Gabapentin 130 9,350 $2,072.74 47
Lisinopril Lisinopril 109 9,150 $803.54 35
Metoprolol Succinate Metoprolol Succinate 101 8,475 $2,037.39 36
Sertraline Hcl Sertraline Hcl 98 7,978 $900.90 33
Metformin Hcl Er Metformin Hcl 92 7,100 $1,054.38 30
Omeprazole Omeprazole 85 6,485 $1,114.81 33
Pravastatin Sodium Pravastatin Sodium 78 6,828 $1,071.88 24
Ozempic Semaglutide 78 3,624 $107,109.16 20
Pantoprazole Sodium Pantoprazole Sodium 77 6,570 $946.89 32
Escitalopram Oxalate Escitalopram Oxalate 75 6,240 $1,181.24 25
Famotidine Famotidine 75 6,135 $841.68 27
Montelukast Sodium Montelukast Sodium 71 5,755 $1,521.84 24
Synthroid Levothyroxine Sodium 62 4,499 $3,530.75 19
Hydrochlorothiazide Hydrochlorothiazide 60 4,809 $379.55 24
Simvastatin Simvastatin 53 4,668 $366.53 21
Allopurinol Allopurinol 53 4,296 $337.19 17
Olmesartan Medoxomil Olmesartan Medoxomil 53 4,320 $1,453.43 17
Duloxetine Hcl Duloxetine Hcl 52 3,697 $807.42 16
Fluoxetine Hcl Fluoxetine Hcl 47 3,990 $624.39 17

(top 25 shown)

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

License # reported to NPPES TX M7791

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.

Pediatrics

NUCC Taxonomy Code: 208000000X

License # reported to NPPES TX M7791

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Texas Medical Board.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - INTERNAL MEDICINE

Medicare Enrollment ID

I20071113000684

Enrollment State Jurisdiction

TX

PECOS Control ID

5395833073

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026

Cypress Physicians Association

13215 Dotson Rd, Houston, TX 770704535

Phone: 2815370300

Cypress Physicians Association

2255 E Mossy Oaks Rd, Spring, TX 773891812

Phone: 2815370300

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

10 listed
Dr. Jessica Anderson , MD

Internal Medicine

NPI 1881885069

Doctor of Medicine (M.D.)

Elizabeth Andrus , FNP

Nurse Practitioner

NPI 1295194967

Family Nurse Practitioner

Dr. Glenn Davis , MD

Internal Medicine

NPI 1003806431

Doctor of Medicine (M.D.)

Dr. Jesse Dunkle , MD

Internal Medicine

NPI 1811384167

Doctor of Medicine (M.D.)

Dr. Humaira Faruqui , MD

Internal Medicine

NPI 1861597619

Doctor of Medicine (M.D.)

Melinda Guerry , PA

Internal Medicine

NPI 1275921579

Physician Assistant

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

9 Historical Events
๐Ÿ“
Updated Practice Location April 03, 2018

Registered at 2255 E MOSSY OAKS RD, STE 680, SPRING, TX 773891812 (Tel: 2815370300)

๐Ÿ“
Updated Business Mailing Address April 03, 2018

Registered at 2255 E MOSSY OAKS RD, STE 680, SPRING, TX 773891812 (Tel: 2815370300)

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) April 03, 2018

Pediatrics (license number reported to NPPES: TX M7791)

โœ…
NPI Profile Active June 17, 2008

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) June 17, 2008

Registered at 1250 CYPRESS STATION DR, SUITE B, HOUSTON, TX 770903052 (Tel: 2815370300)

๐Ÿ“
Business Mailing Address (Initial Record) June 17, 2008

Registered at 1250 CYPRESS STATION DR, SUITE B, HOUSTON, TX 770903052 (Tel: 2815370300)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) June 17, 2008

Recorded as KATHRYN ZIEGLER, MD

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) June 17, 2008

Internal Medicine (license number reported to NPPES: TX M7791)

๐ŸŸข
Initial NPI Registration & Enumeration August 30, 2007

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1114111408
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: August 30, 2007
Last Update: April 03, 2018
Sole Proprietor: No

Other Internal Medicine Providers in Spring

All Internal Medicine Providers in Spring

Mailing Address

2255 E Mossy Oaks Rd, Ste 680

Spring, TX 773891812

Phone: 2815370300

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.