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Orthopedic Surgery

Cynthia A. Kahlenberg, MD

Works at hospitals in Danbury, CT · New York, NY · Stamford, CT · Connecticut, New York

Summary

Dr. Cynthia A. Kahlenberg, MD is an orthopedic surgeon at 1 Blachley Rd, Stamford, CT 06902. Phone: (212) 774-7598. Accepts Medicare assignment. In 2024, Cynthia A. Kahlenberg had 692 Original Medicare patients and 1,451 services. NPI 1316336084. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Orthopedic surgeon (Medicare lists Orthopedic Surgery)
  • Address: 1 Blachley Rd, Stamford, CT 06902 · Directions (3 more locations)
  • Phone: (212) 774‑7598
  • Medicare: Accepts Medicare assignment
  • Hospitals: Danbury Hospital, Hospital for Special Surgery, Stamford Hospital
  • Group practice: Rehabilitation Associates Inc (+1 more)
  • Medical school: Northwestern University Feinberg Medical School · graduated 2015 (11 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Cynthia A. Kahlenberg, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Cynthia A. Kahlenberg accept Medicare assignment?
Yes. Medicare's clinician data says Cynthia A. Kahlenberg accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Cynthia A. Kahlenberg see?
In 2024, CMS data shows 692 Original Medicare patients and 1,451 services for Cynthia A. Kahlenberg. This counts Original Medicare only and measures volume, not quality.
What is Cynthia A. Kahlenberg's NPI number?
1316336084. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Cynthia A. Kahlenberg, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients692
Services billed to Medicare1,451
Different services or procedures26
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)293 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)267 services
  3. Computer-assisted surgery for muscle and bone procedure (20985)144 services
  4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)138 services
  5. Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)130 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • Arthritis75%
  • High blood pressure69%
  • Ischemic heart disease26%
  • Anxiety24%
  • Osteoporosis21%

Hospitals where Cynthia A. Kahlenberg works

Medicare's Facility Affiliation Data lists Cynthia A. Kahlenberg at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Danbury HospitalDanbury, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070033
  • Hospital for Special SurgeryNew York, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 330270
  • Stamford HospitalStamford, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070006

Practice locations

Addresses where Cynthia A. Kahlenberg is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Cynthia A. Kahlenberg as a member of these groups (CMS data updated October 2, 2026).

  • Rehabilitation Associates Inc529 clinicians in the group
  • NY Society for the Relief of Ruptured and Crippled Maintaining183 clinicians in the group

Specialties

Find other Orthopedic Surgery doctors in Connecticut →

Other orthopedic surgeons in Stamford

Clinicians with the same Medicare primary specialty in Stamford, CT — not a recommendation.

All orthopedic surgeons in Stamford →

Other clinicians in Rehabilitation Associates Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolNorthwestern University Feinberg Medical School
Graduation year2015 (11 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1316336084
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians