DR. FREDERICK JOSEPH NACHTWEY M.D.
NPI 1710901822
Internal Medicine - Pulmonary Disease in Walnut Creek, CA

Q: What is Frederick Nachtwey's NPI number?

The NPI number for Frederick Nachtwey is 1710901822. It was assigned to this individual provider in the NPPES registry on July 26, 2006.

Q: What is Frederick Nachtwey's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Active since July 26, 2006PECOS EnrolledAccepts Medicare Assignment

87.26/100

CMS Quality Rating

2637 SHADELANDS DR, WALNUT CREEK, CA 94598(925) 944-0166 Get Directions Write a Review

NPPES record last updated: March 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 3, 2025, Sep 12, 2017 (2 updates tracked since 2017).

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About Dr. Frederick Joseph Nachtwey M.d. NPPES

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

DR. FREDERICK JOSEPH NACHTWEY M.D. (NPI 1710901822) is an individual pulmonary disease provider in Walnut Creek, California, licensed in California (G35274) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Pablo, and is a graduate of Washington University School Of Medicine (1974).

NPPES Registry Identity

NPI1710901822

Entity TypeIndividualMale

Primary Taxonomy207RP1001X

Provider Legal NameDR. FREDERICK JOSEPH NACHTWEYCredential: M.D.

Location Address2637 SHADELANDS DRWalnut Creek, CA 94598-2512

Mailing Address2637 Shadelands DrWalnut Creek, CA 94598-2512 · (925) 944-0166

Phone(925) 944-0166

Sole ProprietorYes

Medical School CMSWashington University School Of MedicineGraduated 1974

Enumeration DateJuly 26, 2006

Last NPPES UpdateMarch 3, 20252 updates tracked since enumeration

NPPES CertifiedMarch 3, 2025

✔ NPI 1710901822 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RP1001X

License✔ Licensed in CA · G35274

Definition

An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.

Also ListedInternal Medicine · Sleep MedicineTaxonomy 207RS0012X · License G35274 (CA)

2637 SHADELANDS DR, Walnut Creek, CA 94598

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Secondary Practice Location 1

Location 12101 Vale Rd Ste 300San Pablo, CA 94806-3846 · Phone (510) 233-3788 · Fax (510) 233-3390

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. Frederick Joseph Nachtwey 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 ID3678536174

PECOS Enrollment IDI20090112000757

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 Frederick Nachtwey reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bass Medical Group

Same address

Specialist

2637 SHADELANDS DR
Walnut Creek, CA 94598

Reassigned Medicare billing, California enrollment
347 clinicians in this Medicare group

NPI 1154401941 (925) 932-6330

John Muir Trauma Physicians Billing Service

1.4 mi

Trauma Surgery

1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598

Reassigned Medicare billing, California enrollment
810 clinicians in this Medicare group

NPI 1962551861 (925) 947-5331

Contra Costa County

3.4 mi

Adult Mental Health

1420 WILLOW PASS RD
Concord, CA 94520

Reassigned Medicare billing, California enrollment
530 clinicians in this Medicare group

NPI 1023188489 (925) 646-5480

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 10

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.

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.

584 services383 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

62 services62 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

55 services55 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

54 services49 patients

Sleep study including heart rate, breathing, and sleep time 95800

A sleep study monitors your sleep patterns to evaluate your sleep quality. It records your heart rate, breathing, and actual sleep time. This information helps identify any sleep disorders, ensuring you get the rest you need for optimal health.

43 services43 patients

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

39 services37 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 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

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

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.

87.26/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

82.97

Promoting Interoperability

85.91

Improvement Activities

Reported Quality Measures

Appropriate Use of DXA Scans in Women Under 65 Years Who Do Not Meet the Risk Factor Profile for Osteoporotic Fracture

Lower rates are better for this measure.

0%22 patients

Breast Cancer Screening

90%158 patients4/55-star benchmark: 93%

Cervical Cancer Screening

53%79 patients3/55-star benchmark: 98%

Colorectal Cancer Screening

71%360 patients4/55-star benchmark: 88%

Controlling High Blood Pressure

76%242 patients4/55-star benchmark: 91%

Diabetes: Eye Exam

34%76 patients2/55-star benchmark: 100%

Diabetes: Hemoglobin A1c (HbA1c) Poor Control (>9%)

Lower rates are better for this measure.

32%76 patients4/55-star benchmark: 91%

Documentation of Current Medications in the Medical Record

22%990 patients1/55-star benchmark: 100%

Falls: Screening for Future Fall Risk

48%414 patients2/55-star benchmark: 100%

HIV Screening

23%234 patients2/55-star benchmark: 60%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

45%613 patients2/55-star benchmark: 98%

Preventive Care and Screening: Screening for Depression and Follow-Up Plan

40%432 patients2/55-star benchmark: 97%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients screened: 90% · 217 patients

89%217 patients

Statin Therapy for the Prevention and Treatment of Cardiovascular Disease

83%301 patients4/55-star benchmark: 91%

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 25

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

Tubing with integrated heating element for use with positive airway pressure device A4604

DME-Other DME · category DE001N

27 suppliers820 claims822 services$33.38 avg. paid by Medicare

Full face mask used with positive airway pressure device, each A7030

DME-Other DME · category DE001N

25 suppliers626 claims627 services$71.53 avg. paid by Medicare

Face mask interface, replacement for full face mask, each A7031

DME-Other DME · category DE001N

25 suppliers593 claims1,504 services$27.80 avg. paid by Medicare

Cushion for use on nasal mask interface, replacement only, each A7032

DME-Other DME · category DE001N

21 suppliers399 claims2,125 services$16.54 avg. paid by Medicare

Pillow for use on nasal cannula type interface, replacement only, pair A7033

DME-Other DME · category DE001N

19 suppliers363 claims1,876 services$12.99 avg. paid by Medicare

Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034

DME-Other DME · category DE001N

23 suppliers780 claims780 services$47.13 avg. paid by Medicare

Headgear used with positive airway pressure device A7035

DME-Other DME · category DE001N

25 suppliers840 claims840 services$16.54 avg. paid by Medicare

Chinstrap used with positive airway pressure device A7036

DME-Other DME · category DE001N

10 suppliers202 claims230 services$9.43 avg. paid by Medicare

Tubing used with positive airway pressure device A7037

DME-Other DME · category DE001N

20 suppliers498 claims498 services$11.98 avg. paid by Medicare

Filter, disposable, used with positive airway pressure device A7038

DME-Other DME · category DE001N

28 suppliers1,439 claims7,730 services$1.77 avg. paid by Medicare

Filter, non disposable, used with positive airway pressure device A7039

DME-Other DME · category DE001N

19 suppliers401 claims401 services$5.31 avg. paid by Medicare

Water chamber for humidifier, used with positive airway pressure device, replacement, each A7046

DME-Other DME · category DE001N

23 suppliers340 claims340 services$11.58 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

2 suppliers15 claims15 services$16.28 avg. paid by Medicare

Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) E0466

DME-Other DME · category DE005N

3 suppliers73 claims73 services$774.79 avg. paid by Medicare

Respiratory assist device, bi-level pressure capability, without backup rate feature, used with noninvasive interface, e.g., nasal or facial mask (intermittent assist device with continuous positive airway pressure device) E0470

DME-Other DME · category DE001N

8 suppliers64 claims64 services$81.73 avg. paid by Medicare

Respiratory assist device, bi-level pressure capability, with back-up rate feature, used with noninvasive interface, e.g., nasal or facial mask (intermittent assist device with continuous positive airway pressure device) E0471

DME-Other DME · category DE001N

3 suppliers22 claims22 services$207.60 avg. paid by Medicare

Humidifier, heated, used with positive airway pressure device E0562

DME-Other DME · category DE001N

12 suppliers135 claims135 services$116.24 avg. paid by Medicare

Humidifier, heated, used with positive airway pressure device E0562

DME-Other DME · category DE001N

3 suppliers31 claims31 services$12.17 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

3 suppliers13 claims13 services$3.05 avg. paid by Medicare

Continuous positive airway pressure (cpap) device E0601

DME-Other DME · category DE001N

19 suppliers1,593 claims1,594 services$27.67 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

8 suppliers110 claims110 services$73.56 avg. paid by Medicare

Portable oxygen concentrator, rental E1392

DME-Oxygen and Supplies · category DC002N

6 suppliers58 claims58 services$33.59 avg. paid by Medicare

Albuterol, up to 2.5 mg and ipratropium bromide, up to 0.5 mg, fda-approved final product, non-compounded, administered through dme J7620

DME-Drugs Administered Through DME · category DG006N

3 suppliers11 claims1,380 services$0.10 avg. paid by Medicare

Portable gaseous oxygen system, rental; home compressor used to fill portable oxygen cylinders; includes portable containers, regulator, flowmeter, humidifier, cannula or mask, and tubing K0738

DME-Oxygen and Supplies · category DC000N

2 suppliers25 claims25 services$34.33 avg. paid by Medicare

Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513

DME-Other DME · category DE000N

4 suppliers13 claims13 services$24.09 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 20

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

MICHAELA STRAZNICKA M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

2637 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 932-6330

DR. CYNTHIA M. MULLEN M.D.

Internal Medicine (Gastroenterology)

2637 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 322-2372

JULIA ALEXA ONDARZA PA-C

Physician Assistant

2637 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 430-5335

BAY AREA SURGICAL SPECIALISTS INC A MEDICAL CORPORATION

Clinic/Center (Magnetic Resonance Imaging (MRI))

2637 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 329-3710

SRUTHI SAKAMURI MD

Obstetrics & Gynecology

2637 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 945-6600

ANITA ANAND NP

Nurse Practitioner (Family)

2637 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 944-0166

DR. MANJARI NATHAN M.D.

Internal Medicine (Pulmonary Disease)

2637 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 944-0166

DR. ALI KHAVARI DPM

Podiatrist (Foot & Ankle Surgery)

2637 SHADELANDS DR
WALNUT CREEK, CA 94598

Contra Costa County (925) 464-1982

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 Frederick Nachtwey's NPI number?

The NPI number for Frederick Nachtwey is 1710901822. It was assigned to this individual provider in the NPPES registry on July 26, 2006.

Where is Frederick Nachtwey located?

Frederick Nachtwey practices at 2637 Shadelands Dr, Walnut Creek, CA 94598. The listed phone number is (925) 944-0166.

What is Frederick Nachtwey's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Frederick Nachtwey enrolled in Medicare?

Yes. Frederick Nachtwey is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Frederick Nachtwey's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Frederick Nachtwey reassigns Medicare benefits to 3 organizations: Bass Medical Group (Walnut Creek, CA), John Muir Trauma Physicians Billing Service (Walnut Creek, CA) and Contra Costa County (Concord, CA). Each 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 Frederick Nachtwey'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 Frederick Nachtwey was last updated on March 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.