Nathan Joseph Klein , FNP-C
Dermatology • Phoenix, AZ
16515 S 40th St Ste 143
Phoenix, AZ 850480560
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on October 24, 2017; this date does not establish years in practice.
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Published CMS data list 1,123 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 17003 — Destruction of precancer skin growth, 2-14 growths: 233 service units.
- 99344 — Residence visit for new patient with moderate level of medical decision making, per day: 173 service units.
- 11102 — Biopsy of related skin growth, first growth: 140 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 11 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 470 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Triamcinolone Acetonide — 113 prescription fills, including refills.
- Clobetasol Propionate — 81 prescription fills, including refills.
- Doxycycline Monohydrate — 67 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 10 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 85% of clinicians listed under Dermatology in Phoenix, AZ (2024, 49 clinicians with data). Median for this group: 3,566. Middle half: 1,797 to 5,966.
Fewer Medicare Part B services than 80% of clinicians listed under Dermatology in Arizona (2024, 224 clinicians with data). Median for this group: 3,943. Middle half: 1,878 to 7,666.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 3,414 in 2020 to 1,123 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
16515 S 40th St Ste 143
Phoenix, AZ 850480560
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Phoenix, AZ. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Nathamy Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2017
What Public CMS Data Show
Dermatology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
259 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $71,273 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.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
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 – by Provider and Service, 2024.
Paid by Medicare
About $55,295 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
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 – by Provider and Service, 2024.
30-day fills
485 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
$16,518 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
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 – by Provider and Drug, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $105.27 in 2024
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2024.
Years since graduation
9 years (graduated 2017)
CMS Doctors and Clinicians data list 2017 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished 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.
NPI first issued
2017
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.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Nathan Klein 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.
Can order Medicare-covered services
CMS lists Nathan Klein 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.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
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.
Compared with the same specialty in Phoenix and Arizona
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 85% of clinicians listed under Dermatology in Phoenix, AZ (2024, 49 clinicians with data). Median for this group: 3,566. Middle half: 1,797 to 5,966.
Fewer Medicare Part B services than 80% of clinicians listed under Dermatology in Arizona (2024, 224 clinicians with data). Median for this group: 3,943. Middle half: 1,878 to 7,666.
Medicare-allowed amount
A lower Medicare-allowed amount than 85% of clinicians listed under Dermatology in Phoenix, AZ (2024, 49 clinicians with data). Median for this group: $281,828. Middle half: $166,440 to $468,545.
A lower Medicare-allowed amount than 85% of clinicians listed under Dermatology in Arizona (2024, 224 clinicians with data). Median for this group: $281,392. Middle half: $150,156 to $520,947.
Paid by Medicare
A lower Medicare payment amount than 85% of clinicians listed under Dermatology in Phoenix, AZ (2024, 49 clinicians with data). Median for this group: $201,763. Middle half: $113,001 to $334,149.
A lower Medicare payment amount than 80% of clinicians listed under Dermatology in Arizona (2024, 224 clinicians with data). Median for this group: $200,367. Middle half: $105,880 to $377,838.
Medicare Part D prescriptions
Fewer Part D prescriptions than 60% of clinicians listed under Dermatology in Phoenix, AZ (2024, 52 clinicians with data). Median for this group: 595. Middle half: 339 to 735.
Fewer Part D prescriptions than 60% of clinicians listed under Dermatology in Arizona (2024, 238 clinicians with data). Median for this group: 597. Middle half: 271 to 922.
Part D drug cost
Close to the middle for clinicians listed under Dermatology in Phoenix, AZ (2024, 52 clinicians with data). Median for this group: $19,809. Middle half: $8,800 to $164,245.
Close to the middle for clinicians listed under Dermatology in Arizona (2024, 238 clinicians with data). Median for this group: $23,120. Middle half: $7,680 to $170,119.
73 active clinicians are listed under Dermatology with a practice address in Phoenix, AZ (350 in Arizona).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Phoenix
4.1% of these 73 clinicians have the CMS telehealth indicator.
68.5% of these 73 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 67% from 3,414 in 2020 to 1,123 in 2024.
- 2020: 3,414
- 2021: 2,479
- 2022: 2,603
- 2023: 1,505
- 2024: 1,123
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Medicare-allowed amount
Medicare-allowed amount decreased 67% from $215,367 in 2020 to $71,273 in 2024.
- 2020: $215,367
- 2021: $194,059
- 2022: $191,774
- 2023: $116,944
- 2024: $71,273
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Paid by Medicare
Paid by Medicare decreased 66% from $162,148 in 2020 to $55,295 in 2024.
- 2020: $162,148
- 2021: $142,237
- 2022: $139,169
- 2023: $82,082
- 2024: $55,295
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Medicare Part D prescriptions
Medicare Part D prescriptions stayed about the same: 473 in 2020 and 470 in 2024.
- 2020: 473
- 2021: 585
- 2022: 527
- 2023: 501
- 2024: 470
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30-day fills
30-day fills stayed about the same: 512 in 2020 and 485 in 2024.
- 2020: 512
- 2021: 614
- 2022: 588
- 2023: 518
- 2024: 485
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Part D drug cost
Part D drug cost increased 28% from $12,902 in 2020 to $16,518 in 2024.
- 2020: $12,902
- 2021: $18,185
- 2022: $15,665
- 2023: $11,376
- 2024: $16,518
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $431.05 in 2021 to $105.27 in 2024.
- 2021: $431.05
- 2022: $240.62
- 2023: $485.36
- 2024: $105.27
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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
Program year 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $105.27.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Incyte Corporation |
Food and Beverage
Cash or cash equivalent
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OPZELURA | General | $105.27 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017–2023 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 – by Provider and Service data, 2018–2024; 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 |
|---|---|---|---|---|
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17003
Destruction of precancer skin growth, 2-14 growths
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233 | 67 | $7.30 | $5.44 |
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99344
Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes
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173 | 173 | $146.87 | $116.15 |
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11102
Biopsy of related skin growth, first growth
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140 | 120 | $104.51 | $73.89 |
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99349
Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes
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134 | 82 | $137.47 | $103.95 |
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11103
Biopsy of related skin growth, each additional growth
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106 | 56 | $51.85 | $41.08 |
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17000
Destruction of precancer skin growth, 1 growth
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104 | 86 | $73.56 | $38.46 |
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99348
Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes
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73 | 54 | $84.34 | $62.65 |
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17110
Destruction of skin growth, 1-14 growths
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68 | 59 | $121.39 | $92.63 |
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99342
Residence visit for new patient with low level of medical decision making, per day, if using time, at least 30 minutes
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53 | 53 | $84.09 | $64.13 |
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99347
Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes
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20 | 13 | $48.35 | $37.11 |
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17262
Destruction of cancer skin growth of trunk, arms, or legs, 1.1-2.0 cm
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19 | 15 | $195.28 | $119.48 |
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.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Triamcinolone Acetonide | Triamcinolone Acetonide | 113 | 3,335 | $2,443.51 | 75 |
| Clobetasol Propionate | Clobetasol Propionate | 81 | 1,920 | $5,709.39 | 51 |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 67 | 842 | $1,475.91 | 43 |
| Ketoconazole | Ketoconazole | 54 | 1,611 | $1,352.31 | 35 |
| Hydrocortisone | Hydrocortisone | 50 | 1,069 | $1,010.70 | 32 |
| Cephalexin | Cephalexin | 29 | 216 | $231.24 | 27 |
| Fluorouracil | Fluorouracil | 22 | 551 | $2,537.75 | 22 |
| Methylprednisolone | Methylprednisolone | 20 | 120 | $291.71 | 15 |
| Permethrin | Permethrin | 17 | 333 | $1,264.02 | — |
| Mupirocin | Mupirocin | 17 | 187 | $201.29 | 17 |
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
Self-certified to NPPES: 2026-03-31NUCC Taxonomy Code: 207N00000X
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
NUCC Taxonomy Code: 363LF0000X
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20180322000794
AZ
6800158346
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
Nathamy Llc
None, Surprise, AZ 85387
Phone: 8664337666
Secondary Practice Locations
19646 N 27th Ave Ste 305
Phoenix, AZ 850274027
Phone: 4805560446
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner
Nurse Practitioner - Family
Family Nurse Practitioner (Board Certified)
Nurse Practitioner - Family
Family Nurse Practitioner (Certified)
Nurse Practitioner - Family
Family Nurse Practitioner (Certified)
Nurse Practitioner - Family
Family Nurse Practitioner (Certified)
Nurse Practitioner - Gerontology
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 16515 S 40TH ST STE 143, PHOENIX, AZ 850480560 (Tel: 8664337666)
Registered at 15207 W PEAKVIEW RD, SURPRISE, AZ 853876380 (Tel: 8664337666)
Registered at 13995 W STATLER BLVD STE 150, SURPRISE, AZ 853745512 (Tel: 4805560446)
Registered at 20401 N 73RD ST STE 230, SCOTTSDALE, AZ 852554153 (Tel: 4805560446)
Registered at 20401 N 73RD ST STE 230, SCOTTSDALE, AZ 852554153 (Tel: 4805560446)
NPI status registered as active in NPPES database
Registered at 14044 W CAMELBACK RD STE 118, LITCHFIELD PARK, AZ 853409481 (Tel: 6235472600)
Registered at 10182 W LOS GATOS DR, PEORIA, AZ 853833552 (Tel: 6023488917)
Recorded as NATHAN KLEIN, FNP-C
Nurse Practitioner (license number reported to NPPES: AZ AP10605)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dermatology Specialists in Phoenix
- Dr. Bianca Kang, MD
- Dr. Carsten Hamann, MD
- Dr. Benjamin Buttars, DO
- Dr. John Stathakis, DO
- Dr. Rita Fisler, MD
- Dr. Stella Chen, MD
Mailing Address
15207 W Peakview Rd
Surprise, AZ 853876380
Phone: 8664337666